"That was amazing"

I say, and gently rub Millie's arm.

Millie keeps looking out over the lake, and slowly shakes her head, then says:

"Matt, I know I was teasing you, and that you are young and hormonal, but I did not expect that you would... fuck me."

Millie keeps looking out over the lake, and sits silently for a while, then continues:

"I mean, I am your step-mom."

Then she pauses for another few seconds and says:

"Why did you fuck me Matt?"