In Millie's pussy

I step closer to Millie, and I slide my dick against Millie's pussy lips. Millie tries to squirm away, but her being wedged in the window limits how much she can move.

"Don't you dare Matt." Millie whispers with a tone that I think she hopes sounds menacing, but comes out sounding more like a mix of nervousness and a bit of excitement.

I can feel that her pussy is getting wetter as I rub my dick against her pussy lips. Millie lets an involuntary moan escape from between her lips, and I feel her body starting to tense up with excitement in anticipation of what is about to come. She might be massively into sex in unusual places, and the danger of the situation and setting we are in is turning her on.

I keep rubbing my dick against Millie's pussy. Millie is breathing heavily now, and I whisper:

"Say fuck me."

I keep rubbing my cock against Millie's now very wet slit. Millie tries to move her body so my dick will go in her pussy.

"Say fuck me." I whisper again.

Millie does not reply, and she keeps trying to get her pussy onto my dick, which I am rubbing against the entrance to her pussy. She is breathing very heavily now, and then she whispers:

"Fuck me."

Then I start pushing my dick into her very wet pussy.