"Cum swap"

I reply.

"Oh, I like it." Millie says, then continues: "Let's make this little bitch do some nasty stuff."

We both look over at Ashley who looks totally grossed out by the idea.

Millie starts jerking my dick, then looks me in the eyes and says:

"I guess you have to cum first for me to be able to spit your cum in Ashley's mouth."

I nod, and act like I am just realising this, then respond:

"Yes, I guess I will have to."

Millie pushes her big tits against the side of my body, then asks:

"How do you want me to make you cum?"