Inside, of course

You feel yourself go over the edge as you release yourself into her, grunting in pleasure as you do.

As you finish cumming you collapse against her, panting. Your cock and her vagina twitching a little as the last vestiges of orgasmic bliss disappear.

You pull your self out of her, watching her lean herself back as she is trying to get your semen deeper inside her.

"I don't know if it will work the first time," she says, "we might have to do it again soon."

"Oh, I'll see you then," you tell her as you put your clothes back on.

What is the next thing you are going to do?