You want Samantha's little sister to ride you

Claire's taste is, for what it's worth, as delicious as you could ever have hoped. The surge of her sweet pussy juice at the end - coupled with the beautiful sound of her orgasmic moaning was more than enough to re-awaken your cock.

You watch Claire's breathing - watch her tiny breasts rise up with every breath - while you give her a moment. But soon you suggest Round 2 and her brown eyes light up. It's clear Claire wants to be fucked by her big sister's boss's big cock, as much as you want to fuck her.

You lay down on the bed and hold your massive cock up.

"It might be easier for you to be on top - so you can control how much you take. Otherwise I might bruise your cervix," you say and Claire laughs nervously.

She gently lowers her body down onto you. "Oh wow, yeah. Did I mention you're really big?" she says. Her pussy is sopping wet from your feasting on it though, so at least you've got plenty of lube to make the penetration as easy as possible.

"I did it!" she says laughing as she finally has taken your whole length inside her. She's already sweating from exhaustion and you haven't even started yet.

"Are you going to tell your sister about my huge cock?" you ask.

Claire's face goes red with embarrassment and you realize it's because she had already determined that this was a secret that she would not be able to possible keep to herself.

"Maybe," she says coyly as she begins to rock her hips back and forth.

"I suppose I'll find out if I see Samantha eying my crotch in the office," you say, gently thrusting up and down.

"Will you get this big in the office though? Do you walk around full erect?"

"Oh it happens from time to time," you say as you continue to fuck.

"You can't tell me you get hard checking out my sister while your fucking me, John!" You can feel in her pussy that despite her scolding that she's turned on by this line of conversation.

"I said nothing of the sort!" you say as Claire continues to ride you.

"But you know," you say, "long dark brown hair, pale white skin, brown eyes, absolutely amazing tiny breasts... I might have a type." You wink at Claire and she respond by putting her hands on your shoulders so she can ride you more fiercely.

"Yeah, fuck me, Claire. You're so fucking hot," you say to encourage her. You want her to believe that even though you clearly are attracted to her sister that she's the hot one. She's getting cock that's (supposedly) off limits to her boyfriend.

You and Claire take turns rubbing her clit as she fucks you, until her movements sliding up and down your cock are too fast for either of you to keep up with and she have a beautiful, loud, orgasm.

Following her orgasm you roll her onto her back and get on top of her. You slide your cock back inside of Claire as she moans, and then you fuck her hard with your giant cock. You can't keep this up long, you are about to cum for the second time tonight.