All in

“Do it.” real Katie moans, slamming into herself with the rubber copy of your cock, “Punch me in the face.”

You take a second to think about this, this might be getting out of hand but you’re along for the ride at this point, you’re deep inside your girlfriends sister who loves getting roughed up, pretending she’s your actual girlfriend. There’s a lot going on here so you’d better just enjoy it. Looking down at Greenie you see that she’s slapping her tits in between pinching them so hard her knuckles are white. You draw Katie’s face on Greenie’s small bouncing body. You bring your arm back and then let it fly. Catching Tess square. Her head flies back and bounces off the couch. She stares at you hard with a glare on her face. You’re worried for a second that you’ve gone too far. You slow your thrusting to a stop, you can still feel Greenie’s pussy clenching around you. Your worries vanish when the glare splits into a lustful grin.

“You liked that didn’t you stud?” Tess pants as you keep slamming her, “You liked punching Katie. I felt your frustration at her. I felt it all. I swear I fucking came. I want more!”

“Give it her baby.” Katie moans. “This is so hot. I’m imagining it’s me under you, and I love it!”

“So what do you want Greenie?” you ask and grind your hips.

“Bend me the fuck over. Fish hook me and break my tiny ass open.” Tess groans.

“Do it.” Katie encourages you, “Fuck my slutty sister’s and make her scream! Pretend she’s me.”

You pull out of Tess and sit back for a second to catch your breath. Greenie sits up and rubs her face and tits. She looks over at her sister who is spreading some lube on the special dildo you made for her.

“What’s that?” Tess asks.

“It’s his dick.” Katie explains, “We made it one time before he went out of town. So he could still fuck me every night he was away.”

“That’s so fucking hot. Can I get a copy?” Tess asks, “What are you going to do with it now?”

“Maybe. If you’re good you can have a copy. Now though I’m going to put it in my ass while he puts the real one in yours.”

“Oh wow.” is about all you can say.

“Wow is right.” Greenie agrees, lightly rubbing herself, “Think about it. You’re going to be fucking sisters in the ass at the same time.”

You hadn’t thought about it like that. The only time you and Katie had tried anal she’d cried and couldn’t take much more than your tip. She’d given up and played an anal video on her phone while giving you a pretty good handjob. Now she’s going to try and take the fake on there while you give the real one to her sister. This night continues to blow your mind. While you’re pondering this Greenie has flipped over and is on her knees and elbows on the couch. Katie has leaned back in the chair and spread her legs wide, her tiny little asshole visible. She’s lined the copy up with it and is teasing the entrance. Tess’ ass is thrust up at you.

“Fuck my ass stud.” Greenie moans, “Fuck it hard, while my sister fucks herself with your dick. Take two sisters up the ass at once. Then there’s only one sister left.”

“Oh fuck.” Katie moans, thinking about her older sister Andrea. Andrea is the same tall brunette as both of these sisters, but curvy. Andrea is about 5’11” and busty with huge DDs and a big round ass, “I wish I could see him do this to Andrea too.”

“How hot would that be? One cock, three asses.” Tess teases, “Andrea says she hates it rough, I used to live with her. But I know she secretly gets off on it. How could we convince her?”

“Are you kidding?” you ask, simply amazed at the turns this night keeps taking, “There’s no way right?”

Katie considers for a second. Andrea is a nurse now, and works a night shift usually. Katie knows Andrea has a wild streak but isn’t sure how she’d react to the kinds of things Tess is suggesting. It had taken a few weeks for Tess to even agree to this. Tess is glad she did though, she’s never had a night like this. Andrea does love her sisters, and they’ve seen each other in sexual situations before. Andrea was the first of the sisters to do everything and she’d teach them about it after. They’ve always been open and honest about sex stuff before.

“You’re all in right baby?” Katie asks you. You’re convinced this is completely crazy, but so was roughing Greenie up, and that happened and brought you here, “And you Tess?”

“I am.” you agree, at the most you figure there’ll be a short break while this goes nowhere

“All in.” Tess agrees. She sits down on the couch and you sit next to her, both of your eyes trained on Katie. Tess starts to slowly and gently stroke your dick to keep it hard. Katie sets the rubber dick aside and pulls out her phone. You sit back and enjoy Tess’ slow teasing handjob while Katie taps away on her phone. Katie giggles and sets it down. It’s on the edge of the chair for a few seconds before you hear it chirp again. Katie smiles and taps in another message. She holds it in her hands and it chirps. She types something else in and sits it down. Tess slows and squeezes your shaft, Katie grins uncontrollably, the phone chirps twice more. Katie picks it up and giggles when she reads it.