Have a chat with Liz as your cum dries on her chest

You've tested a few boundaries now, getting Liz and Amy to do sexy things to you, rather than you having your way with them. You decide that you'd like to try pushing it further.

"Actually," you say, turning around a little, "Amy, could I get you to suck me hard again? I'm quite enjoying having my cock out, but I don't want to make Liz uncomfortable."

"Sure thing," says Amy, cheerfully.

You stand up to let Amy off the couch. Liz' eyes zip straight to your dangling cock. "How about me?" she asks.

"Actually Liz," you say, "I'd prefer that you leave my semen on your chest for now."

"Sure," she says with a nod. She turns to pick up her shirt. "Oh wait, that would get cum in my top."

"Hm, yeah," says Amy as she gets off the couch. "I mean, it is a white top, but semen stains can be hard to get out if you don't wash them out right away."

Liz looks at her shirt contemplatively. "It is just a shirt, but I don't really want to get cum stains in it. Does semen dry up, like water does?"

Amy shrugs as she moves to collect her bra and shirt. "Not exactly. It leaves marks where it dries up, but if it dried up on your chest it would wash out later. I'd lend you an old shirt or something so that you didn't have to go topless around John, but I just did my laundry." Amy finishes putting her bra on.

"Actually, Amy, come sit on my lap for a moment first," you say. Amy lets her shirt drop and comes your way.

"I guess I can just put my shirt on when John's cum has dried up," says Liz, uncertainly as Amy sits on your lap.

You're interested in Amy's and Liz' almost reflexive reactions to putting their tops back on, when clearly they have no objections to taking them off for specific sexual requests. You reach for Amy's bra strap, and unclasp it. Amy doesn't react noticeably as the bra falls back off of her chest. You take the bra and throw it back with Amy's shirt.

"I think you probably should keep it off for now," Amy says, permitting you to bring your hands around to cup her breasts. You give her warm globes a gentle heave, and squeeze them gently. "John doesn't mind, do you?"

"Not at all," you say, flicking one of Amy's nipples.

Liz shrugs uncertainly, as you let go of Amy's chest.

"Suck on it nice and slow please," you tell Amy. She nods, and gets up, making no particular motion to grab her bra or shirt. She kneels in front of you and brings her face down towards your lap. She gently takes your member in hand, and begins licking at it slowly.

Liz has turned to you uncertainly. She is sitting on her hands, and has spread her legs wide open. You look down at her pussy, which is still rosy from her arousal earlier and your short liason with her. She relaxes slightly, but then blushes as you look up to her semen-streaked chest.

"Are you uncomfortable, Liz?" you ask.

"Um, I'm just feeling a bit funny about you staring at my chest," she says, not commenting on her naked sister licking your manhood in front of her.

"What's weird about that?" said Amy. "John is probably enjoying seeing his cum all over your chest anyway. As long as your chest is covered with his cum, it's nothing too strange. I've told you about the things John has me do all the time," she says, resuming her licking.

"Yeah, but it's different just hearing about it. Doing it makes me feel a bit... flushed," she says.

"It's okay if you're a bit excited by being completely naked in front of me," you tell Liz jokingly, "I like it too."

"John, are you flirting with my sister?" Amy says teasingly between licks.

"Just a little," you say, letting your gaze wander down to the arrow tattoos on Liz' mound. You feel yourself starting to swell.

"Better watch out Liz," Amy says, "I think John is getting hard for you." She takes your growing member into her mouth, and begins to swirl her tongue slowly around it.

Liz looks to you, her eyes wide open. "Are you?"

You look to her appraisingly. However Liz was before the changes that Charles and 'The Doctor' imposed on the world, she seems to have adapted a little differently than Amy has. Amy's very casual about both being bottomless and available as your sexual plaything. Liz, on the other hand, is very gung-ho in her attitude about her bottomlessness (as evidenced by her tattoos and her annoyance at your initial hesitance to gaze at her pussy), but is both here and at her party with her friend George, is not taking the changes in sexuality completely in stride.

You decide to be straightforward with Liz, lacking any ideas of how to approach the situation more delicately. "Yes. I find you very sexy Liz... I hope that we can be friends, because I'd like to fuck you on a regular basis."

Liz squirms slightly. "Thanks," she says. You eyes look up to her boobs, and she blushes. "Do you enjoy looking at my tits?"

You're not sure about stoking Liz up with her sister here, if Liz is going to feel anxious about it. You decide instead to tease her by verbally downplaying her state of undress and just engaging in normal conversation, while still drinking her in. "Yeah. But Actually Liz, I wanted to know more about you: I can't believe that Amy didn't even mention that she had a sister!"

Amy comes up briefly for air. "It is a bit strange. I guess she never came up somehow. I don't really talk much about my childhood I guess." She takes your cock back into her mouth and continues caressing it with her tongue.

Liz shrugs. "Well, here I am! In the flesh, so to speak," she says, squirming slightly with discomfort. "What would you like to know?"