Of course - although the shoot with your Sister turns out more Risky than Risqué

You hardly even hesitate in agreeing to Lyra's suggestion, loving both the premise and the opportunity to get a little more hands-on and closer to your Sister's cock. Moments later you're in your Sister's room being shown a variety of skimpy outfits to pick from for the shoot all coming out of a suitcase Lyra packed so she'd have some sexy outfits ready to wear. You end up picking out some red lingerie made from a sheer fabric in a lace style, however, you quickly realise that the matching bra is too small to fit you.

"Damn Sis, I never realised how much bigger your tits were than mine," Lyra jokes as you finally give up trying to see if you could squeeze into the bra.

"Any ideas?" You ask

"Well all my bras are going to be similar sizes so not big enough for your big ol boobies," Lyra replies, laughing as she place a hand on each of your boobs and cupping them gently.

"I guess we could go without?" You offer uncertainly, lightly biting your bottom lip as you enjoy the feeling of your Sister's hands cupping and squeezing your boobs, the palm of her hand lightly grazing your nipples.

"I think it'd work better if we have you start in more clothes," Lyra replies giving your sizeable chest one last squeeze before standing back and thinking for a moment. "I do have some oversized T-shirts that might work," Lyra offers rummaging through her bag before pulling out a large pink T-shirt with the words Daddy's Little Slut proudly written in a white font made that's designed to look like it was written by the same white dripping from a pair of black lips higher up on the shirt.

"Wow, that's certainly a statement," You reply shaking your head and laughing while holding the shirt up in front of you.

"Yeah, sorry about the design, I thought it was a cute colour and kinda funny," Lyra says laughing nervously as you. "I think that one might even have been a gift from my number one fan," She adds with a smile.

"I take it they're a fan of all the step-sis and step-mom porn," You ask raising an eyebrow.

"Oh definitely," Lyra replies with a giggle. "The Fam part of his name is kinda a giveaway," She adds with a grin.

"Oh, I thought it was just like the collective name for futa fans," You reply.

"Nope, they're a diehard **** fan," Lyra replies with a giggle. "Thinks porn and stories with step-relatives aren't even real **** they're that fanatical about it," Lyra adds with a smile.

"Damn, guess it really matters to some people," You reply shaking your head as you look down at the shirt. "I bet they'd lose their mind if they knew I was your Sister," You add with a soft laugh.

"Funny enough that's what the Project Fruits thing was about," Lyra says with a grin. "Was hoping I might finally roleplay some **** stuff with a real partner," Lyra explains with a casual shrug. "Not sure I can even post that sort of content to the fan site even if I wanted to," Lyra admits with a wry smile as she thinks of her alternative fan site which was all too happy to host that stuff.

"Wild," You reply shaking your head and laughing, "Lucky for us our Dad was a deadbeat and disappeared so we know this statement isn't true," You reply with a smile.

"Women with Daddy issues and porn, it's a tale as old as time," Lyra jokes back the pair of you enjoying a moment together.

"Well, I guess people should be more focused on us rather than the clothing anyhow," You say, pulling the pink shirt over your head and adjusting it over your sizeable mounds.

"Exactly, plus it's not like you'll be wearing it that long," Lyra replies with a grin as she strips down to just her bra and underwear.

Even from halfway across the room you can make out the distinctive outline of your younger Sister's big cock and your heart begins to beat just a little faster as you begin to fantasise about what might happen today. You lick your lips and allow your imagination to run wild, your eyes fixed on the bulge in Lyra's panties while your Sister begins to set up an impressive-looking camera on a tripod. There were also a couple of microphones hidden around the room to better capture the audio for the video Lyra is planning to post to that taboo site.

"Alright, got a second camera for alternative angles, and my phone for the up close and personal shots," Lyra explains with a grin. "It'll be video again for ease of selecting the best stills," Lyra lies with the barest hint of an evil smile on her lips.

"Alright, Sis, just tell me what to do," You reply with a smile.

Lyra nods and you start off with you getting into a few different poses on the bed, teasing the shirt, by pulling it taught until your swollen nipples are clearly visible through the fabric. Next, there are a few poses of you lying on your back with your legs closed showing off your long legs and a few of you pulling at the waistband of the red lacy panties. The next shot is the first to include some of Lyra, with you sitting at the edge of the bed, tugging the neck of your top to reveal the sweet valley between your large boobs from above, with Lyra's cock half hard and tenting her underwear.

After that you take a few more poses, these more suggestive than the last, the shirt is almost lifted off enough to reveal your large tits, with some displaying just a hint of your nipples. Others were of your lying back legs parting to slowly reveal more and more of the lacy panties, concluding with one where your legs were spread wide with your hand over the crotch to hide the slowly growing damp spot in the middle of the panties. That final shot included Lyra again, this time her cock is now fully hard and obscenely tenting her underwear and your eyes wide with excitement.

Lyra keeps giving you instructions for how to pose and what sort of expression to use and you eagerly obey, knowing that each picture taken that your Sister approves of is one step closer to seeing just how risque this shoot will get. The next set have you finally discarding the tasteless T-shirt and revealing your large tits for the first time, with you taking various poses holding and teasing your boobs and nipples. The final pose of this shoot has you lying on your back head right next to Lyra while you reach up and paw at her panties, stroking and caressing her cock through the soft fabric before finally pulling them down and revealing the cock.

This close to your younger Sister's big thick hard member and her big heavy balls once again have your head swimming. You were already horny before now but with the scintillating muskier yet sweet scent coming from your Sister's sex you can scarcely hold yourself back as you greedily lick your lips while studying your Sister's equipment from beneath. Even the glistening lips of Lyra's pussy look inviting to you and you've never once even thought about another woman sexually before.

"Alright, as much as I'd love nothing more than to slide my cock down your throat in this position," Lyra says taking a deep breath to calm herself while her cock twitches heavily, a long bead of precum drips from her swollen crown and drops on your face. "I think we should stick to the plan," Lyra adds after taking another breath. "If you could roll onto your back and turn around so your legs are where your head currently is," Lyra requests in a confident tone.

You're half tempted to protest and say perhaps you have time for just a little oral action, but then you remember that the original plan has Lyra teasing you by rubbing her cock over your panties. So without taking any time to complain or try and persuade your Sister differently you quickly take up the position. You feel a warm rush of excitement when you slide yourself down and end up with Lyra standing between your legs, cock rock hard and ready to fuck with just an increasingly damp pair of panties being the only thing between you.

Taking hold of your ankles and lifting your legs up and into the air, Lyra takes her cock in one hand and begins to press it towards the damp spot on the red panties. You let out a soft moan of pleasure when you feel your younger Sister's hardness brush against the damp fabric, the swollen crown brushing against your swollen lips.

"Holy shit that feels so hot and wet," Lyra hisses as she slowly teases her cock up and down the length of your mound, the sheer fabric of the panties practically turning translucent as your Sister presses the material against your sex. "You must really want me," Lyra teases with a sensual giggle.

"Fuck feels so good," You groan, fingers clawing at the sheets in a mixture of pleasure, but also frustration of wanting more, so much more.

"Maybe I should get you a shirt that says Sister's little slut," Lyra teases, sliding her cock forward, the swollen tip of her crown brushing against your clit and sending a shockwave of pleasure through your body. "What do you reckon, Big Sis?" Lyra asks in a teasing tone. "Are you my needy slut, **** to feel her Sister's cock?" She adds with a giggle, knowing full well her futa hormones and all the teasing were driving you wild. You'd almost agree to anything in this state.

"Oh god, it's so wrong, but I would," You admit, toes curling as you feel Lyra slide her cock lower until the tip is hovering at where the entrance to your inner sex is, just the damp fabric preventing her from sliding her solid mass inside you.

You let out a low gasp of surprise and pleasure as you feel Lyra thrust forward, the tip of her thick futa fuck stick digs into you, pressing the sodden fabric into your pussy. The thin fabric straining to keep your Sister's cock at bay, while you gasp and groan, enjoying this new sensation, the closest you've come to having Lyra inside you.

"Well I think these will make for some great shots, but maybe we could go further," Lyra offers with an evil smile. "If that's ok with you, big Sis?" Lyra asks in a low sensual tone.

"Yeah, sounds great," You gasp unsure what exactly you're agreeing to.

Lyra's evil smile widens at your response and before you have any time to react or realise what your Sister is doing, the thing red lacy panties are shifted to one side revealing the hot juicy mess of your hungry folds. You look up helplessly, unwilling to move as your younger Sister takes hold of her cock and lowers herself down towards your exposed pussy.

You bite down on your lower lip and his in exquisite pleasure when you feel Lyra's cock pressing against your hot wet folds. There's a long pause that seems to stretch out infinitely to your mind but is barely a few seconds in reality as Lyra's cock sits at the entrance to your inner sex. You were more than ready for your younger Sister to claim you physically even if mentally you might panic once the lust cloud clears. Just one tiny thrust would be all Lyra needs to spear her cock into you, spreading your hot wet walls with her thickness, stretching you wide as she fills you.

Lyra is tempted, the long pause is her wrestling with the idea of just taking you here and now, hoping she makes enough of an impact that you couldn't possibly say no to her future advances. Yet she wants you to be the one who makes that move, begging her to fuck you to cross the line into incestuous bliss. That said, Lyra has no issues playing the age of game of just the tip to give you a taster of what was to come.

Lyra smiles to herself, slowly pressing her hips forward the swollen length of her thick throbbing cock mounting pressure against your inner folds only to slide her cock forward at the last second before she slides inside. This new teasing drives you wild as you gasp and groan in pleasure as you feel your Sister grinding herself against your sex.

"Fuck I really want to fuck you," Lyra groans.

"I want it too," You hiss hungrily.

"But we can't not yet at least," Lyra replies letting out a low grunt of pleasure.

"Why not," You groan needily.

"Too much too soon," Lyra replies with a giggle.

"Please, just put it in a little, I need it," You plead.

"Fuck we really shouldn't" Lyra replies with a grin.

"Please, I'll do anything," You plead desperately.

"Fuck it," Lyra groans with a grunt. "But just the tip then, is that ok?" She offers, lowering her cock down your swollen lips until her cock is pressing just against the entrance to your pussy, stopping only to pull your panties off so nothing could get between you.

"Oh god yes," You hiss as your younger Sister presses forward until finally the thick head of her cock slides between your inner folds and sinks into your velvety core.

"Holy shit, that's hot and tight," Lyra groans, completely overwhelmed by the raw sensation of her Big Sister's sex squeezing and caressing the sensitive head of her shaft.

"So good," You groan, feeling that sweet heat and pressure quickly growing inside you.

"Just the tip, just the tip," Lyra repeats to herself as she sinks another inch of her cock inside of you, making your toes curl in delight.

The pleasure of feeling a cock inside you for the first time in so long is maddening, couple this with it being the first cock you've taken bareback and it being your Sister's cock rapidly has you climbing the dizzying peaks of orgasm. Even with Lyra only using the first two inches of her cock to slowly slide in and out of your hungry pussy, you know you won't last long.

Lyra is equally struggling with the overwhelming sensation of finally having her cock inside of you. Despite being no stranger to fucking bareback, the knowledge that her cock is inside her big Sister's pussy, her first taste of the truly forbidden fruit is driving Lyra crazy. Her normal futa stamina and years of sexual experience were practically meaningless in the face of this all. Her cock throbbing and swelling, her heavy balls churning as your Sister reaches her own limits much faster than expected.

"Oh fuck cumming," You groan, your entire body quaking as you cry out in ecstasy, your eyes close while you thrash and squeal in delight, the soft walls of your sex squeezing and milking your Sister's cock.

Your mind struggles to process the sheer volume of pleasure as you experience the most intense orgasm of your life. Leaving you completely oblivious to Lyra, who was letting out a muffled grunt to conceal her own orgasm. Her cock throbbing and pulsing as hot thick sticky cum is unloaded into the depths of your twitching pussy. Thankfully after shooting about half her load into your pussy, Lyra regains her senses and pulls out, shooting the rest of her cum onto your stomach.

Once Lyra is finished, she uses the soaking wet panties to mop up the cum leaking out of your pussy to hide any evidence of her partial insemination although ensuring that it's well documented on video for the upload she'll be posting to the taboo site late. Once done, Lyra discards the thoroughly soiled panties to the floor and kicks them under the bed, where you wouldn't be able to see the cum stains, then cuddles up next to you, holding you tightly and waiting for you to come down from your orgasmic high.

When you do finally regain the ability to think you instinctively reach down and feel an immense sense of relief when you feel the warm stick mess on your stomach. In the heat of the moment, you didn't even think to discuss protection or rather your complete lack of it so finding out your Sister hadn't just cum inside you was a huge relief.

"Sorry about the mess," Lyra says softly.

"No it's ok, better here than inside me," You reply with a giggle.

"Oh shit, you're not on the pill?" Lyra replies, her heart racing and cock stirring back to hardness at this response.

"No, I haven't really needed it these last months and my Ex-husband always used condoms," You explain with a soft laugh. "That was the first time I've ever had sex without one," You admit, biting down on your bottom lip as your body is rocked by a delicious aftershock of pleasure.

"No kidding," Lyra replies, her hand resting on your body sliding lower, just below your belly button, you're sister wondering if any of her swimmers might just beat the long odds and knock you up before she gets a chance to breed you properly.

"I don't suppose Futa sperm isn't as potent as a man's?" You ask hopefully. "Because I can only imagine how amazing feeling all of you inside me without a condom would feel," You add shaking in delight.

"Sadly I think our fun juice is even more potent," Lyra replies with a proud grin.

"Then I'm doubly glad you didn't get any in me," You reply with a laugh. "Fuck imagine having to explain this to Mom if you got me pregnant," You add with another laugh.

"I dunno, I think she'd settle for any kind of grandkids by now," Lyra jokes with a wicked grin. "Besides I think we'd make beautiful children together," She adds teasing you.

"Don't even joke," You reply shaking your head.

"Just thinking about these big titties getting swollen and full of milk," Lyra teases. "Plus I hear it's several generations of inbreeding before anything starts to go wrong," She adds in a teasing manner.

"Oh god, this is so fucked up," You reply shaking your head and laughing.

"But in seriousness, I'll see if we can get some condoms tomorrow," Lyra replies.

"Tomorrow? Someone's eager," You reply with a grin.

"Hey I'm just being a realist here," Lyra replies with a smile. "Better to have some on hand than be caught short, especially since I'll need a brand that will fit and are futa grade," Lyra admits with a smile.