A threesome and a voyeur.

"Oh sweetie, of course," your mother says as she moves to embrace your sister.

A moment later they're making out noisily as they pull each other toward the bed, where they stop just long enough to sit down before Sarah's tongue is back in your mom's mouth. Their hands roam as they mash their lips together, groping each other's breasts and clumsily tugging at their clothes. You start undressing as well without taking your eyes off the action.

It's not until you're in your boxers that the girls look up. "So how are we gonna do this?" you ask with a smirk when you realize they're both looking at your barely-contained boner.

"Well, it's kind of weird that you've never used your pussy, right?" Sarah asks. "I think we ought to change that as soon as possible. But I really want to watch you fuck mom first."

"I'm good with that," you say as your boxers drop. You sit on the bed as well, cock pointing straight up. "Why don't you help her out of those clothes and we'll get started?"

"Like this?" Sarah asks as she finishes opening your mom's shirt, then takes it off her and gets to work on her bra.

"Just like that," you confirm when her big tits are revealed. Your sister immediately has her hands all over them, squeezing and groping and making mommy moan.

You could watch this for a while even with your cock standing straight up, so it's Elisa who moves things along. "Come on honey, you can play with those all you want in a moment. But you have to let me up so I can get out of my jeans."

Sarah reluctantly lets go of her new toys, but the moment your mom is standing her hands are back. She goes for the pants this time, deftly unbuttoning them while pulling her closer. She presses her lips against her mother's stomach, and trails a line of kisses down her body in the wake of the jeans as they come off. As they lower, revealing a sexy pair of red panties, Sarah slides off the bed to kneel on the carpet and keep pulling down.

When the pants are off she kisses her way back up Elsie's legs until she reaches her crotch, where she takes a deep whiff of the milf's scent. Then she hooks her fingers into those red panties and slides them off as well. A glistening wet pussy comes into view briefly, only to be blocked from sight when Sarah leans in to give it a long lick.

Your mom moans in surprise, and Sarah grins up at her. "Delicious," she announces while standing up. "But this creampie is missing an ingredient. Ryan, want to help your favorite cook out with some cream filling?"

Sarah pushes your mom onto her back on the bed, and a moment later you're on top of her. Your mother's legs spread for you, and you scoot in until your dick makes contact. You rub it against her pussy, sliding the underside of your shaft between her wet lips until she moans "give it to me already!"

You oblige her with a grin, drawing back only to push forward and press into her hot cunt. Your lover's legs wrap around you to pull you in, and you lean down to kiss her lips while your cock sinks into her. After taking a second to enjoy just being inside Elsie, you move your hips back and start thrusting slowly but forcefully, putting on a show for your sister.

When you look up, Sarah has joined you on the bed and is unbuttoning her own shirt as she watches. But behind her, you can see someone else is watching you too: the bedroom door is ajar, and June is standing on the landing outside. She peeks curiously through the gap, fondling herself through her shirt with one hand while she watches you fuck the woman you introduced to her as your girlfriend's mother. You don't think she knows you can see her, so you decide to play unaware.

"You have the best little titties ever sis," you announce when Sarah frees them from the confines of her bra. "They're a beautiful contrast to mom's big milkers."

Your sister looks at you oddly before responding. "Aww, thanks Ryan! Want to give me a grope?"

Sarah comes closer so you can feel up her perky handfuls without slowing your thrusts into Elsie. When you lean down to suck her nipples into your mouth, she stops you and moves back, kneeling behind your mother's head. From there she bends forward until her chest is right above Elisa's face. It's not easy to coordinate with your thrusting and the gasps it causes, but you manage to get things lined up so your mom can suck on one nipple while you noisily slurp on the other.

You stay like this until your mom tenses, squeezing both her daughter's breasts in her hands as her first orgasm hits her. Deciding to change things up for the next one, you push your sister away and flip Elsie over onto her hands and knees. "Finish stripping Sarah, show mom where my dick is going next," you say, your hands on your mom's ass as you take her from behind.

Sarah is focused on watching you fuck doggy style, but she catches herself long enough to get out of her shorts. Then she sits directly in front of her mother, legs spread, and begins to rub her clit while she gets back to watching. This leaves Elsie staring at her daughter's cunt, and you know exactly how to make sure things keep progressing.

You slam into your mom, pushing her forward with each thrust until her head is between Sarah's legs. One more thrust and her nose bumps against Sarah's cunt, at which point you lean forward and use your hand to push her face into it. The shift also forces your cock deeper into her, and her mouth opens to let out a moan.

Feeling the vibration against her labia, Sarah's hands take over for yours, grabbing fistfulls of hair to keep mom's head where it belongs. When Sarah's moans indicate that she's being licked properly, you put your hands back on your mother's ass and give it a good smack before you thrust into her again. Sarah gasps when the head between her legs jolts forward, pressing against her cunt.

You fuck your mom vigorously, smacking her ass once in a while but mostly just holding and squeezing her firm globes. Her moans are muffled by her daughter's vag, but coax similar sounds from Sarah as the stimulation she's receiving increases with each moan.

Soon those sounds reach a fever pitch as Sarah is driven to a rapid climax by her mother's tongue. Elisa convulses between you as her second orgasm hits, and finally you cum too.

But you're not done. Shoving your mom gently onto her side, you advance on Sarah. She stares at your cock, still hard and glistening with your mother's juices,and keeps her legs open so you can crawl between them. "Fuck your cunt, Ryan. I know you've wanted to do this since we realized it's yours."

It's true, and while playing the long game has been rewarding there's no reason to delay it any longer. Grabbing your sister by the hips, you hobble the last step forward and impale her on your cock.

Sarah gasps when you enter her for the first time. Instinctively, her arms come up to reach around your shoulders and hold you against her body. You sink into her, pushing deeper until your cock is all the way in. At the same time, your mother gets up and crawls to Sarah's side. When you prop yourself up on your elbows to get more leverage for your thrusts, she takes the opportunity to get her hands between you so she can play with Sarah's tits again. Paying her no mind, you begin thrusting into Sarah, who squeals from the combined stimulation.

You're not going to cum any time soon after you just finished in your mom, so you settle in for a long fuck. You start with some slow, deep thrusts to let Sarah get used to your cock, before gradually speeding up until you're pounding into her. Sarah clings to you, leaving barely enough room for your mom's hands to reach her tits, and squeaks with every thrust. After her first orgasm she grabs Elisa's head and pulls her into a deep kiss, which doesn't decrease the amount of noise she's making at all. It's a loud, vigorous fuck and June is witnessing all of it with wide eyes. When you look up you can see her standing behind the cracked door, biting her lip to prevent herself from making a sound as one hand moves under her pants and the other holds onto the door frame to keep her balanced.

Still pretending you haven't seen her, you look back at your family. You're nearing your limit, so you give it your all to make sure Sarah gets another orgasm before you cum. Her nails scratch your upper back and shoulders, but you can barely feel the pain. You just groan loudly as you unload inside her, and when her arms relax you flop onto the bed next to her, exhausted.

When you glance at the open door again, there's nobody there. You guess June snuck away to finish herself off in private.

Then you fall asleep.