Just a little shower sex between half-siblings. (N)

"Mmm....give me that dick, you bad boy...." Zoe grinds her big squishy ass against your crotch, pumping on your cock almost without any input from you. "I'll teach you not to fuck around on Jenna and me." Oh, it's 'and me' now, huh?
"You're right, Zoe. I don't know what I was thinking."
She looks back, a wicked grin on her face as she pulls her wet hair over one shoulder. "I should just take Jenna away from you. We'll...be...two...happy lesbians....would you like that Jimmy? Want me to take your wife away, you cheating bastard?"
Ugh. She clearly wants you to play along.
"Please...don't take Jenna away from me, Zoe." You grab her ass with both hands, really spearing her cunt now.
"Aww!!! Mmm!!! Okay....I guess I won't....fuuuck...." she's lost in pleasure now, rubbing her clit as you pump deep into her.
After another minute, she pulls off, sitting on the little built-in shower seat. She spreads her legs and points to her pink pussy, crowned with a patch of strawberry blonde hair. "Eat my pussy, Jimmy."
You oblige. After busting a nut at Lucy's house, you don't think you're going to cum, anyway. You kneel down and eat her snatch with a mixture of contrition and desire. Her snatch is quite delicious: freshly washed and smelling clean and musky. She drapes her legs over you as you pull out all your tricks, until she's panting and grinding your face into it, bucking and moaning.
"Fuuuuuuckkk!!!!!" she shudders with orgasm, and slumps against the wall of the shower.
You finish up the shower, and as you dry off, strolling into the bedroom, you are greeted by Jenna. She's standing in the bedroom, arms folded, regarding you both with an amused and annoyed expression.
"Oh...h-hey Jenna...." Zoe pipes up with a stupid grin. Suddenly, she's the one with the guilty expression.