No, you and Robin leave

"Uh, no... this cock is mine. Thanks for teaching me how to do throat, and I love playing with you, but that doesn't mean I'm going to just let you fuck him." Robin quickly pulls her top back on and takes your hand, leading you back to the house.

You aren't really sure where her mind is right now so you leave it alone and wait for her to start the conversation. You're about halfway back to the house when she opens up. "Can we be honest with each other?"

"I hope so, we've been dating for years!" You joke. At least, you think it's been years. For you it hasn't even been a full day. You just hope she isn't going to ask who's hotter.

"How did you feel about the... I guess you could call it a threesome?"

Still a tricky question, but go for broke. Even if it doesn't work out, you still have your mom, right? "I'm not going to lie, it was really hot. But I don't want you to be uncomfortable either, I want you to enjoy it too."

"Good," Robin started. Good? Then why did we leave? "It was really hot for me too, but then I think I just didn't like when it got too... Dominant?"

"So, you don't like anyone being dominant in bed?"

"Well... I guess in the spirit of being honest, I actually thought the domination was hot. I just wanted to be the one dominating Quinn, but it was too far when I realized that. "

"Interesting, did you want to dominate me?" You ask.

"No, not at all. I think I wanted you to dominate both of us, actually."

"Oh really?"you ask with a sheepish grin and a smack on her ass.

"Mmm, yes. We'll have to talk more about it." Robin says as you both enter the back door to the house.

"How about you tell me more about exactly what it is that gets you excited while we shower?" You say as you walk into your room.

"I like where your head is, baby," Robin says as she strips her top off quickly and throws it playfully in your face. "Or rather, where you're head is going to be," she says as she grabs your bulge. You lunge to grab her but she escapes, pushes you off balance onto the bed and giggles. She quickly strips her shorts and throws them at you as well before her perky naked body dances off to the shower. You hear the water running and quickly strip as well and follow her, finding her waiting for the water to heat. You wrap your arms around her and she purrs at your touch.

Robin spins in your arms and kisses you, then pulls you in with her when she feels the water warm enough. Under the water your hands both start roaming each other's bodies, moaning as you concentrate on the most sensitive areas. Robin starts by washing you. The last thing she does is clean your cock, washing it with long strokes up and down as she kisses you. "Your turn," she announces, handing you the washcloth.

"But what if I want to start by getting you dirty?" You ask as you push her back against the wall. You kiss her, then let your kisses roam down her chin and neck before telling her in a low tone. "I want to get back to that 'honest' discussion from earlier." your hands roaming her body.

"How do you expect me to think when you're touching me like that?"

"If it helps, they're questions about the bedroom," you say as you massage her tits, water cascading down her hot body.

"Oh fuck, I was already so turned on from earlier. Now you want to talk about sex? I can't promise I'm going to survive this line of questioning" she replies with a grin.

"Well in that case, I'll start by covering some ground we already covered and go from there." Robin nods slightly and bites her lip as your hands continued to roam her body.

"You said earlier that the thought of a threesome with Quinn was hot, right?"

"Mmm... Very"

"Good. And you want to try dominating another woman in bed?"

Robin begins moaning more. "Fuck yes baby"

"Soo... Safe to say from those answers that you would be interested in dominating another woman from our fantasy, yes?"

A slight pout from Robin this time. "Yes, but now that I know that Quinn wants to dominate me, I don't think I would enjoy it as much knowing she's just pretending to submit." She opens her eyes, smiles, and grabs your cock. " Though I can't blame the girl for being **** to have this inside her."

You smile back at her. "Good to know, but that's not what I had in mind." Now you lean in closer, your hand sliding down her body, finger in between her pussy lips, teasing her. Your thumb finds her clit and you feel her shiver. Time to swing for the fences. You whisper in her ear, "how would you feel about a threesome with mom, and dominating her?" You offer lucratively.

Robin's whole body shakes and she almost screams in pleasure. "Fuck yes!" She yells. "I don't even care if you can make that happen or not. It's so fucking hot that you even said it. I need you inside me, NOW!"

Robin kicks a leg up into the air for you to grab. You hang it on your arm as you grab her ass with both hands. Robin reaches down between you two and grabs your cock, guiding it to her pussy. You press into her and slide so easily despite how tight she is on your thick cock. "Fuck you're so wet Robin... I think my naughty sister really loves the thought of making her mommy our little submissive slut."

"FUCK!" Robin screams, good thing anyone hearing it would understand. Her first orgasm comes quick and shakes her. You feel her nails digging into your back. As she catches her breath it's her turn to talk dirty and drive you over the edge. "I fucking love it Michael. I want it so bad. I want everything with you so bad."she wraps her arms around your neck tight, pulling her head next to yours. She whispers in your ear as you pound her pussy with hard, deep thrusts, "but right now, what I really want is to feel you cumming inside me." She feels your hesitation. The guy that's been dating her for years would know if she's on birth control, but you don't. She pushes even harder, "give it to me baby. Fuck your dirty slut of a girlfriend and fill her with your hot seed. BREED YOUR SISTER!"

The phrase that should have stopped you cold instead made it impossible to stop. You slam your cock to the hilt, pinning Robin off her feet, stuck to the wall on your cock. Your balls empty all their cum so in your sister as she gets racked by another powerful orgasm. Her pussy milks your cum out and pulls it into her.

You both recover and slowly put Robin down. She kisses you so hard. "I love how hard you cum when I tell you to breed me. One of these days I'm going to have to stop the pill and let you actually do it"she says with a wink. There's one question answered.

You keep washing each other, starting from scratch after that fuck session. As you dry off together, Robin asks, "so were you kidding about a threesome with mom, or did you actually have a plan?"