You slow down a bit, and give her a hand

"That explains your experience, at least..." You mumble in Rachel's ear while watching her jerk herself off, curiousity in your voice as you're briefly slowing your thrusts inside of her to a steady grind. "What does it feel like? To have one of both, I mean..."

"I don't know what it feels like to be normal...!" She reminds you, and giggles a little as you start fondling her tits again. You sense that she's still a little nervous while talking about her 'secret', though her love for you clearly shines through. "What does it feel like, to make love to a freak?"

"You're not a freak!" You're quick to object, grinning as you kiss at the nape of her neck, while pulling her further upright until you can hold her tight in your arms again. "You're a little bit different, but none in their right mind would call you a freak...!"

"Oh yeah?" She says, with just a little bit of sarcasm in her voice as she looks back at you, while provocingly thrusting her cock out like a spear in front of her. "Why do you think no other boys would touch me then?"

"I really don't know!" You tell her, but surprises even yourself as you slowly slide your hand down her tummy and take her right up on her challenge. Her hardness feels strange in the palm of your hand, but still familar in shape and size as it ressembles your own.

If you're surprised about your move, it's still nothing compared to Rachel, who gasps and then grabs firmly around your wrists as if to keep you away. You won't let go so easily though, and you quite enjoy her undulating body in your arms as you try a first few strokes on her shaft.

"Oh, god...!" She whispers, and just sits there on her knees while you slowly start moving inside of her again - matching the pace of your hands as they move across her boobs and her cock respectively. "John, you... really don't have to..."

"But I can't see you objecting...?" You reply with a teasing smile, already picking up the pace while trying to tell yourself that there's nothing 'wrong' about what you're doing to her. She's still the most wonderful woman you've ever met, and the fact she's got something more than the usual kind doesn't mean in any way that you're into other men.

"But... I'm..." She's trying to tell you something, but her voice fails her while she shudder and trembles in your arms, and then you can feel her cock throbbing in your hand before suddenly erupting in a torrent of jizz. Rope after rope of the sticky substance flies through the air, making your lover moan out loud in both pleasure and alarm as it splatters across the floor, table, and just barely not reaching your old TV.

You don't care for the mess though, but simply keep humping her faster again while letting her finish her peak. And just a few moments later you find yourself about to be following suit, as her pussy convulses around you in the throes of her orgasm, and unwittingly milks you for your load...