Take what you own.

On the contrary. Theresa has been nothing but bad. A very bad girl, indeed. But she's your bad girl.

Hopping up onto your knees, you give your dick a soft squeeze. Normally you're a one-and-done sort, but here you are, raring to go again. You can only blame Theresa's unforgivably sexy body, coaxing you into a full length experience. Who wouldn't want to go as long as possible with that round, toned ass just begging to get bounced. Theresa lays on her front, hiking up her rear and presenting herself to you with a hypnotic wiggle. She glances back at your from the pillow she's holding onto, eyes alight with giddy anticipation.

"I trust you know how this part works?"

You nod, shuffling over to your sister, your gaze locked that dripping, wanting pussy. God, knowing she wants this so badly does wonders for quashing your doubts. There's no going back after this. A little heavy petting and fooling around is one thing , but this... this is the last line. You're going to cross it, you tell yourself, but it's a little daunting just how ready you are to take this all the way. Part of you should still be resisting. Instead, you're lining up the head of your cock at Theresa's burning slit.

"J-Just go slow at first, okay? Give me time to stretch around you." Oh, is she nervous now? That's a nice boost to your ego, pulling your lips into a grin.

"Are you telling me how to enjoy my property, sis?" Your hands find her hips, giving the soft flesh a firm, grasping squeeze. She gasps and shudders, looking back at you with resistant concern.

"N-No, Bubby, you can..." her breath catches, feeling you press against her entrance. "You can do anything you want with me. I'm yours, all yours, just... j-just put it in already...!"

Well, which is it? Do you go slow or get to the point? Just dipping your toe into dirty talk and she's already getting ****. Your projected lust must be driving her totally up the wall. You're not sure whether honoring her first request would be considerate or torturous for her, but you don't actually want to hurt her. With a gentle nudge, you let the head of your boilingly hot cock slip in, gasping at this first taste of a pussy's envelopment of your loins. Both of you let out a low, hungry growl, Theresa's hips pushing back against you just a little.

"F-Fuuuuck, I take it back, I take it baaack...! Bubby, just... go for it!"

"Oh, but what if I want to go slow?" You pull back before pushing again, only giving her one new inch inside. Your sister growls and groans into her support pillow, trying to push more of you inside, only for you to pull back in time.

"B-Buuubbyyyyy...! Please, please... I need it. Your big sister needs your big, thick cock to fill her up...!" She's trying to entice you, to get control back. You shake your head, only kneading the pliant flesh of her ass instead.

"I think you can do a little better than that." Truth be told, you're driving yourself nuts as well. You want nothing more than to ram Theresa's face into the bed with your thrusts, but... lording your control over her is also quite invigorating.

"Buh...wha? Bubby, what..." She sputters, searching for an answer with wild, **** eyes. "...Master?" Your cock throbs inside in response to that word, sending a jolt through her nerves. "Ah...! Yes... Use me, master. I'm all yours. Your toy. Your property. Please, use your sweet little cocksleeve however you want..."

Oh, damn. Whatever switch you just flipped, you love it. With such a heartfelt, subservient plea, how can you not reward her? With a firm grunt, you immediately hilt yourself inside your sister. She yelps and hisses into her pillow, but she's as wet and ready for it as she could ever be. You bask in the heat for a moment, enjoying her soft ass rubbing side to side against your crotch.

"MMmmmngh, yeeessss.... I-I was right, you are a perfect fit..." Her eyes roll back, ragged breaths making her shudder in your grasp. While you don't have the same experience as Theresa, you have to agree. She fits over your cock like a glove, gripping you with little spasms. "T-take your time, B-...Master... you'll get into a rhythm soon enough. I know you can do it."

Right. Sex is more than just being conjoined. C'mon, big guy, it's time to leave your virginity behind and give your poor puddle of a sister what she wants. You pull back a little, feeling a natural catch when your cockhead reaches her entrance. Taking the signal, you shove back in, grunting at the buzz of pleasure.

Again. Faster. Again. More. Harder. Before long, you're rewarded with the rhythmic slapping of skin to skin, watching the small ripples slide across Theresa's ass as she pushes back to meet your thrusts. Each thump against her makes the mumbly girl grunt and moan, sharp and short as she tries to find a time to breathe.

"So good... y-you feel so good, Master... p-please, please don't stop, don't slow down. Ruin that pussy of yours! It's all yours, I'm yours, just please don't stop!" You feel some fretful motion down near your balls, Theresa practically laying on one of her arms. Her fingers are assaulting her clit, making her pant harder as you keep pace.

"Mnnn... Sis, I'm... I'm gonna cum!" But you don't slow down. Now is not the time for worries or consequences. You ram forward, pushing as fast and hard as you can muster, groaning along with Theresa as she buzzes her button, determined to blow alongside you.

"Do it, fucking fill me! Make me yours, Master, take me! Take what you oooowwwwwwww—!!"

Theresa's moans rise in pitch until they're a primal howl, the pillow doing nothing to lower her volume as her walls grip and milk your cock, sending you over the edge. You plow forward, gripping Theresa's hips tightly as you release. She doesn't stop moving, doggedly riding your cock through the climax as a flood of mixed juices dribble around your shaft. You can feel your load sliding around in the last throes of pleasured motion, pumping out more and more with each exhilarating throb. Just when you feel like the world might start going black, the ecstasy fades, breath and control returning to you.

Pulling back with a wet squishing sound, you watch a few beads of your seed dribble out of your sister's twitching pussy. You should be mortified, you should be wracked with guilt and regret...but you're not. All you feel is a heavy wave of satisfaction, watching Theresa groan and mumble helplessly on the bed, practically bathing in your mingled fluids.

Falling over onto her side, Theresa peers up at you with wonder and adoration. With a goofy smile, she opens her arms out to you, clapping her fingers against her palms in a childish 'gimme' gesture. You comply, shuffling over beside her for some unexpected cuddles. This is... nice. She's still so warm, moist from a healthy sheen of sweat, but holding each other in your arms and just being close on the bed is satisfying in its own way. She coos in your ear, planting a light kiss on your jaw.

"You're a natural, Bubby... that was incredible for your first time. Not even that, it was pretty great, period..!" She giggles quietly, basking with you in the afterglow. "If that's how you are now, I can't wait to see how you perform with some more practice."

You move a lock of hair out of Theresa's face, thumb trailing down to rub her cheek. She nuzzles into your hand, pulling at your heart with such cute little sounds. You clear your throat, oddly flustered despite your most recent exploits. "More practice, huh? Well... if you're going to keep offering, I'm not going to say no." She smiles brightly at you, already anticipating your next adventure. "But, ah... since when are you into all this 'master' stuff?"

Theresa's already bright cheeks heat up further, her gaze bashfully faltering. "Oh, I dunno... I've tried dirty talk with boys before, calling them 'Daddy' and stuff. Sure, it makes them happy, but it's never really done anything for me, before. For you, though... you got into it, too. You took control when I was the one supposed to be teaching you. Having a guy take charge like that, but still giving me what I want, I just..." she shudders. "I came so hard I thought I was gonna pass out."

"Do you think it's because of this, what to call it... lust connection we have?"

She shrugs a little, kissing your nose. "No idea, but who cares? It felt amazing and I want more. Y'know, when I can feel my toes again."

"More, huh?" Sounds good to you! But this is leverage, and you recall having a game you want to bring to a close. "Well, if you want more, then..."

She pouts a little, trying to disarm you with babydoll eyes. "You're not gonna hold sex over me, are you??"

"Nah, of course not," you say through a winning grin, "Just as long as you finally tell me what my present is."

To that, Theresa's eyes go wide, jaw slack, looking past you at nothing in particular. "You still don't know??"

"Nope. Wherever you've put this thing, it's better hidden than you might've thought."

A surprisingly worried expression washes over her face, her lip caught under her teeth. "It's not a... a thing, Bubby..."

Ugh, no more riddles. No more games. "Sis. Tell me." You know ordering her is no fun, but you've had more than enough. "What did you claim for me as a present."

"Mom," she blurts abruptly.

"...Mom, what?"

"I claimed Mom for you."

...

...

WHAT?

Spookity here. I have contracted COVID, and am taking a break this week to recuperate. I will pick my stories back up after this passes. Hopefully this passes soon...ugh.

See you all later.