I Like to Watch

I gently opened Amy's legs and put my mouth on her. She was wet and swollen, having been masturbating, and she was sensitive so that after only a couple of seconds I could hear her starting to moan.
I looked up but couldn't see anything more than Jennifer's ass sitting on Amy's chest. Jennifer was just watching Amy receive pleasure from her boyfriend.
I explored with my tongue feeling around her labia and thighs, and then settled in to finish her off. She was moaning in rhythm with my tongue.