"I want to watch a bit more first"

I reply.

Millie nods, then tells Ashley:

"Get up!"

Ashley does as told.

Millie walks over and sits down on a chair. She holds the strap-on with one hand, then gestures with the other for Ashley to sit on it. Ashley walks over to Millie, straddles her lap, then slowly lowers her pussy onto the strap-on. As she gets it all the way to the hilt into her pussy, Ashley tilts her head back and let's out a low moan of pleasure. She then starts bouncing on the strap-on, slowly at first, then faster.

Millie's tits are rubbing against Ashley's tits, and Millie grabs Ashley's ass and starts squeezing it, pulling Ashley closer to her. One of Ashley's hands wanders down Millie's shoulder, along Millie's arm, then Ashley puts it on one of Millie's big tits and squeezes her nipple. Millie closes her eyes, then starts rocking her hips up and down, meeting Ashley's bounces on the strap-on.

Then Millie looks over at me and asks: "How should I fuck her next?"