Physical inspection

"You've got a nice body, Ellen, but we're going to make sure it's perfect," you say, remembering something from back home that makes a lot more sense with what you have learned about your sisters recently. You just heard snippets through the walls and caught the occasional glimpse, but you pieced together that Ellen used to weigh Katy in the bathroom each morning and look at her body, inspecting her tan and muscle tone, really going over her little sister's body with a fine-toothed comb, criticizing every microscopic flaw.

At the time you assumed Ellen was just helping Katy be the perfect cheerleader, and you were much more concerned with catching glimpses of Katy in her underwear before you were spotted and chased into your room. But in hindsight it was some kind of twisted lesbian domination thing, cruelly critiquing Katy's body even though it was completely fine by any reasonable estimate. It's a wonder your little sister didn't develop an eating disorder.

Sure enough, Katy's eyes light up and she springs up in bed as if hit with an electrical shock. "Physical inspection??" she says, then says to Heather, "My big sister was always inspecting my body back in the day, even making me diet and shave pubic hairs I missed. And she always had plenty of other criticisms. She'd also make me show her even more intimate details. I guess I loved it and hated it at the same time."

You didn't quite know all of that, but it's hardly surprising.

"Now it's time to turn the tables, huh?" Heather says with a grin. You get the impression Heather got no attention whatsoever from her family growing up, that's part of why she eats up your positive treatment of her now, but she's clearly amused by your overly close family and eager to join in.

"Sorry Katy but I'll take the lead, you'll definitely be participating tough," you say, and Katy nods unquestioningly. You look to Ellen to see how she's taking all of this. She's a little hard to read and she's just standing there with her arms at the side of her naked body. Her face looks almost stunned, like she's realizing she's going to pay for her past sins, but she doesn't utter any objections. Ellen is smart and strong-willed, if she didn't want to do this, you know she wouldn't be standing there submissively. You take that as permission to go for it.

"Get the scale, Katy," you say, "Tiptoe."

"Yes master," Katy says with a grin and stealthily creeps to the bathroom down the hall where there's a portable scale. You watch her tight, naked butt as she sneaks out the door and are satisfied that you picked the right member of your party for this job.

"Now, I already see some pubic hair stubble," you say, remembering what a boner it gave you the one time you overheard Ellen criticizing Katy's pubic shaving technique. "It's funny you were such a bitch about that to Katy when you had a full bush of your own at the time, huh?"

"Were you a hippie chick?" Heather says, getting in on the humiliation, "Unshaved pubes are so gross!" Ellen adjusts her mouth, and at first you think she's holding back a nasty retort, but her whole body squirms. She's enjoying this.

"Count her pubic hairs, Heather," you command, "It looks like five o'clock shadow down there!" There's no real need to do this except to humiliate Ellen, so of course you go for it. Heather leans in, looking at Ellen's pubic mound and starts counting. It's really not that bad of a shaving job, you've seen worse in porno, but it does stand out compared to Heather and Katy who keep themselves so pleasingly smooth down there.

"I know you're new to shaving your twat but you have to do better," you say to Ellen, watching her face as she keeps squirming in wordless humiliation and delight. "If you can't get it totally hairless, I'll have to have Heather and Katy shave you."

"No!" Ellen blurts out as Heather leans in to inspect her pussy up close. Did you hit a nerve already? "I'll do a better job, if it's such a big deal..."

Okay she's a little surly still, but that feels right. If she was being your robotic **** you'd know she was acting. This is the real Ellen.

"Twenty-two, twenty three, geeze, you've got more stubble than a 14-year-old boy trying to grow his first mustache!" Heather says. Ellen looks absolutely mortified, but takes it.

Just then Katy comes in with the scale, so incredibly quietly that she's in the room before you even notice her. You file away her skill at stealth for future use, it may come in handy.

"Fifty-one!" Heather says gleefully, "Yeah I can totally show you how to shave your pussy better, Ellen."

"That's your twat," you say, "Let's see how you shave in back. Turn around."

"In... back?" Ellen says, looking horrified and aroused at the same time. "I didn't even realize..."

"Psssh you inspected me there gleefully," Katy says, "Turn around, bitch! Let's see that butthole!"

Katy and Heather sit with you on the bed as Ellen goes white and shows you her backside. Of course her back and butt are hairless, a woman has no need to shave there, it's the part that's hidden from your view now that is in question. From her reaction you're pretty sure Ellen forgot to shave her asshole, which is such an incredibly humiliating thing in the first place, but now you're going to make this grown woman show you her shame in pornographic detail.

"Bend over and spread your ass cheeks, Ellen," you say bluntly. Her body twitches in terror but that just makes you think you're on a rewarding path for everyone here.

Ellen bends over slowly, silently, show you her nice slightly plump ass. She reaches back with her fingers and begins to spread her ass cheeks. You see her pink pucker and sure enough, several wiry asshole hairs.

"Ewww it's all hairy!" Heather says.

"Don't you know anything about being a woman?" Katy says in a tone that suggests she's getting **** for some teenage insult Ellen gave her. "You've gotta squat in the shower and shave your butthole hairs. A lady must be totally hairless."

"Y-yeah," Ellen says, "I'll do better. I'm sorry."

This is so perversely hot. You go around front to look at Ellen's face as her mouth contorts and she gasps for breath, holding her ass cheeks apart for inspection by the two girls. "What a hairy butthole," Heather says. Ellen turns red. You wonder if this is too much but Ellen mouths something to you.

You squint and she does mouths it again so you can't miss it.

She's saying "More!"

"You've seen every detail of Katy apparently, it's only fair she sees every bit of you. Spread your asshole open, let her see inside you."

Ellen grimaces then makes an angry face at you. But she was literally asking for this so you just smirk. You'd love to look up her asshole like Katy and Heather are now, but you're sure you'll see that sight soon enough and for now you're enjoying watching her face as she abases herself. You can tell she's spreading herself open though even from this angle, and the girls ooh and aah as loudly as they dare when Ellen spreads her butthole for them.

"Mmm yeah stick your fingers in your stink," Heather says, "Spread that butthole for us, girl!"

Female domination is a beautiful thing to behold, as long as they're dominating another woman of course. Ellen seems to agree, looking at you intensely as she spreads her asshole for your sister and girlfriend.

"I can see inside you, Ellen! Your uh, is that her rectum?" Katy says.

"I guess, that's her anus there that's she spreading," Heather says, as if they're suddenly in anatomy class. Ellen's face is turning a bright read at having her most embarassing body parts discussed like this. "Maybe we're looking into her colon. It's all red and pink, wow."

"Where's her sphincter?" Heather says, and you can't help laughing at the clueless anatomy lesson.

You're rock hard now and decide to have some fun of your own as Ellen gets her butthole inspected. You kiss Ellen on the lips and she responds almost with electricity, kissing you back so eagerly. You just intended to embarrass her with this, you remember last spring she made some comment about how she'd rather kiss the dog than kiss her little brother, but now she's loving it.

"At least she's clean in there huh?" Heather says.

"Don't be gross!" Heather yells, breaking the kiss, but her tormentors just laugh.

"It's kind of like a pink tunnel," Katy comments, and Ellen's face gets even redder.

You stand up and Ellen's face is right in front of your crotch. You point your ten-inch dick at her mouth and she slowly opens wide. "Mmmm not yet," you say, "Soon you'll be begging me to fuck your mouth as hard as I can. But we have things to do first."

Ellen looks disappointed that you're not making her suck your dick yet, even though you know she's also still terrified of giving you a real blowjob and gagging or even worse.

"Stand up," you say, and sit on the bed with the other girls. "Get on the scale."

Ellen swallows in dread but can't disobey. She steps onto the scale, which is one the female members of your family bought because it's supposedly unfailingly accurate.

You don't have to look yourself, Katy leans over to eyeball it as the digital scale settles on Ellen's final tally. "132 pounds," Katy says, "Tsk tsk."

"What's that in kilos?" Heather asks. Oh yeah, sometimes you forget she's not American and uses that wacky metric system.

"Just divide by 2.2," Ellen says, still standing on the scale. When everyone looks at her blankly, she says "60 kilograms, duh."

"Sorry we non-robots can't divide by fractions in our head!" Katy says sarcastically, then walks over to Ellen and pinches her tummy, finding some flab. "Remember when you did this to me? And I weighed less than you."

Ellen stands there, looking a little dazed. You assume Katy's telling the truth and that's a horrible thing to do to a teenage girl, but Ellen seems near her breaking point, and perhaps getting payback for teenage scars is taking this a little too far.

"Let's finish inspecting her," you say, "What do you think of her boobs, Heather?"

"They're just about as good as mine," Heather says with a goofy tone that makes even Ellen laugh. Heather plays with Ellen's breasts, lifting them up by the nipples, making your big sister squirm. "Not even saggy... pretty good for an older lady."

"Hey I'm just 23!" Ellen says, grinning. But she stays rigid, letting the girls inspect her body. Katy makes her lift her arms to see if she shaves her armpits sufficiently, Heather looks at Ellen's soles and says she has nice feet. Does your girlfriend have a foot fetish?

Ellen takes it all, showing the three of you any part of her body you want to see.

"Well do I pass inspection?" she asks after a few minutes of poking and prodding.

"I think so," you say, then look to Heather and Katy, who both nod.

"Yes," Heather says, "You're worthy of my boyfriend, Ellen."

Ellen swallows nervously, seeing where this is going.

"Yes," Katy says with an evil grin, "You're worth of your master's cock."

Heather and Katy guide Ellen onto her back on your bed and spread her legs unnecessarily wide as they push her knees apart as far as they'll go, but it does give you a rather lewd view of your big sister's pussy. They're acting like your perverted assistants, or Ellen's sister in submission... whatever it is, it's nice. Ellen is trembling as she lays there holding their hands. Your big sister does seem to have a genuine phobia of cocks. She is intrigued by them, obviously, she's not a lesbian... but she's scared of them. She's stayed a virgin until the age of 23 despite no apparent lack of horniness. She must truly think any cock will hurt her, and that yours might nearly kill her.

You stand kneel over her on the bed and she looks at your cock with her twisted fascination. She strokes it gently and you let her play with it, rubbing the balls and moving her fingers along your shaft. It's tempting to just hold her down and ram it inside her, you're certainly horny enough, and she'd probably even let you do it no matter how much it hurt, but maybe this will work better if you let Ellen take it at her own pace.

The other girls lay naked on either side of Ellen. "It's time," Heather says into her ear gently, "You've waited long enough. It might hurt but it will feel good too, I promise."

If you needed any help getting to maximum hardness, your girlfriend talking Ellen into giving her virginity up to you does the trick. You love that Heather has become so devoted she will get other women to submit to your cock to please you. Of course, you have to be a good master to her in return, and you will be.

Ellen reaches out and takes the hand of each girl at her side as you press your cockhead against your big sister's vaginal entrance. You haven't asked her about birth control but there's really no way you're using a condom at this point, with the way these women let you do whatever feels best for you. Ellen hardly tells you to stop as you press inside slowly, feeling her warm and wet pussy for the first time.

Your big sister, who's teased and taunted you since you were a kid with her superior attitude, but you're not mad at her anymore. You see she was just a scared girl, and is still a scared woman. Scared of boys, scared of cocks, yet fascinated by them.

"It's okay," you say, "Just relax and take my cock."

Ellen smiles softly, nervously, but she doesn't stop you as you press deeper. You feel resistance much earlier than you're used to and realize you've already hit her hymen. She closes her eyes, you give it a push and feel her hymen pressed to the side. You've taken your big sister's virginity.

Her pussy is so wet and hot. She must be very horny. Somehow this feels even more forbidden than your little sister's pussy. Katy was a brat but she was never the total ice queen that Ellen was. To get inside your big sister's vagina is the ultimate conquest.

Ellen gasps as you push deeper. She starts to cry and you think it's too much, but she runs her fingers through your hair. "It's okay," she says softly, "I can take it."

You press deeper into her tightness. Somehow she's even tighter than Katy on the first time. Her big tits glisten with sweat. You press deeper and she cries out, but it turns into a moan as you push on. Her pussy walls squeeze your cock in a not at all unpleasant way. In fact, her tightness makes you want to cram even more of your cock in, so you do. You take a few throats and she grunts in pain but again is moaning by the end.

You know you should take it easy on her for her first time, but you can't resist. You need to feel her cervix with your cock. You thrust deep to touch her most intimate spot.

"Aah!" she says, and you pull back.

"Did you touch you there?" Heather says softly into Ellen's ear.

"Y-yeah," your big sister says, "It's okay. Do it again."

You grin. You know it hurt her, but obviously she felt pleasure too. You press deep again and feel her cervix once more, but this time keep pushing. Something about breaking into the womb a woman who claimed this was impossible, or that no woman would ever want it, having her now wanting you to do it to her, it's an incredible new level of erotic thrill.

"You want me in your womb?" you ask cockilly.

"Yes, little brother," she says through gritted teeth as you poke at her cervix, "I'm ready."

You give it to her hard, pressing as deep as you can and feeling the delightful sensation of a woman's cervix parting around your cockhead once again. You feel her womb around the end of your cock now and your balls slapping against her body. Katy scoots down to watch and ooh and aah at the deep penetration.

"Fuck! You're in my womb!" Ellen almost screams it and Heather covers her mouth with her hand, ever cognizant of the need to keep Mom from hearing. Your girlfriend keeps your big sister from screaming out as you fuck Ellen's womb gently, in and out a few times, her body shaking hard under you, her eyes open now and looking at you intensely.

"I'm going to cum in your womb," you say, not even giving her a choice, but she doesn't shake her head no. Your cock explodes and you hold it inside this time, feeling your own cum all around your cockhead as Ellen's baby chamber fills up with your sperm. Her body convulses under you and she moans out an intense orgasm, muffled by Heather's hand. You let her pussy milk your cum then pull out finally, jizz and pussy juice dripping from your cock.

"Clean me," you say to Katy, and she eagerly uses her mouth and licks off your cum and vaginal fluids from her sister.

You collapse between the women and realize you're out of breath and drenched with sweat. You've been fucking for well over an hour. The girls drape their arms over you and each other and you all lay there for a while peacefully, happily. Having three girlfriends should be drama central, but there's no jealousy at all. They all love you, and accept that this is how you want it to be.

"I love you all," you say eventually, and they all let out sighs of contentment.

After what feels like an eternity, Ellen stands up. You see your cum is dripping down her thighs and it's beautiful.

"Come on, Katy," she says, reaching for your little sister's hand to pull her toward the door, "We have to get back to our room before Mom wakes up. It's almost morning."

You've been making love to your sisters all night long.

Yikes. I meant to write multiple options here but hopefully it's obvious this was rather intense and story-progressing, so it didn't end up being a good place for various options that didn't affect the overall story. Thanks to Duskwolf for the suggestion, it overlapped with some things I'd already been intending to do.