Make it an orgasm race

"Make it hotter?" Alice said still struggling to hold herself up in the shower.

"Let's see who can make each other cum first," I said, staving off my own moans.

Alice got a wicked look on her face, and said, "Oh you're on, Christy."

And she stood up again, and plunged her fingers inside of me. I gasped, it was the first time in a long time someone had touched me there, and by my own sister too!

It felt so wonderful, her fingers knew right where to go. Strange, considering she had never been with a girl before, as far as I knew. But I didn't have time to think about that. I was getting close.

Christy, for her part, wasn't doing much better. She had started to lean on me again, and was moaning and purring in regular intervals. It's true it had been a long while for me, but I was still pro here.

Then Christy looked up at me, opened her soft blue eyes, and said, "Cum for me, Christy. I want to feel you cum for me." She said it so sultry, so seductively. I had no idea Alice could sound like that. And, it was working. God I loved hearing talk like that, and I was desperately weak against it.

It was going to be close.