She doesn't have to

Alice smiles it's quite amazing how quickly you're already forgetting the girl she was as more memories begin to flow forward. You're very good siblings after all, sharing everything even a bed. You'd never thought about going all the way before today but that didn't mean that you didn't play around a bit. You'd both shared a boyfriend and girlfriend enjoying the sensations of carnal pleasure. You shake your head trying to reconcile the arousal you feel with your previous disgust. You aren't gay? Not gay at all, you just happily enjoyed Stevie together for the moment, the poor silly goose can't really survive on her own.

You grin a little bit.

"Well little sister, since I've had my fun with you maybe we'll just give Stevie a turn, but you'd like to see what happens when we make two maternity Goths.," you add grasping your girlfriend and pulling her into your lap feeling her rub against your laddered cock.

"While I definitely wouldn't say no to that, I have a better idea, why don't you take her from the front and I'll go get Mr purple from my room," she replied referring to her purple strapon fondly.

Her room? Since when did she? It didn't matter, it's not like this was going to be a one-time thing. If there was one thing you know about your sister, once a boundary has been crossed she is always eager to keep crossing it.

Both of you were stereotypical deviants. There was never a line you wouldn't cross for pleasure. Maybe once you were done reaming Stevie into oblivion. You could discuss what to do with this wonderful new toy.