You'd rather take your time, but you probably should be quick — as if you really have a choice

You’d like to make this last forever, but you’re nervous about your mother catching you and you don’t want Abbie to be late for her final. She’s always cared more about her grades than you, and she’s so close to graduating.

Besides, with your gorgeous sister lavishing attention on your dick and begging hungrily for your cum, it’s not like you are going to be able to hold out for long, anyway.

Then a thought surfaces that’s been in the back since of your mind Abbie told you your dick is bigger than most guys’. Something about where she saw one bigger. “You had a threeway with a girl?” you blurt out. You start cumming hard.

Your sister gulps and swallows, drinking it all greedily before she wipes her lips and answers with a foxy grin. “Oh yeah, when Cyn or I liked a guy, we’d give him a little surprise. You men all dream about it.” She gently kisses the tip of your sensitive cock, making you shudder.

“So… you’re bi?” you ask, surprised you never knew that about your sister. She isn’t the kind of person who would stay in the closet.

“No, just a little flexible,” she says as she sits up. “We did it more for the man’s benefit. We’d make out a little as a show for a guy, just kissing and fondling. Girls don’t have as much resistance or stigma when it comes to getting affectionate with each other, you know. It’s kinda fun. But it’s not like we make out when it’s just us. We’ve never even touched each other’s pussies when we’re with a guy. Anyway, when the guy was good and worked up from watching, whoever was dating him would fuck him, while the other made out with him.”

Your pulse quickens as you picture what your sister is describing. “That must have been incredible for the guy,” you say, a little awed by the idea.

Abbie frowns. “I sooo want to do it for you, Stretch, but it would get awkward if Cyn finds out you’re my brother. She’s kinky, but I don’t know how she’d feel about getting into an **** thing. I'll ask her if you want me to, though.” Then her eyes light up and she smiles. “Hey! If you enchant her, it wouldn’t matter if she had an **** squick; she’d be up for anything you like. We could give you threesomes all the time. Hell, you could pick any girls you like and have a harem, then use us in any combinations you like.”