Confront them with an erection

I climbed off the counter and took off my pants. I was full of resolve as I walked to the patio door, my erection poking out the slit of my boxers. I slid it open and stepped out on the patio.

Both girls looked up at me as I walked toward them. Jennifer was shocked with her mouth open and her eyes wide. Her cheeks shone with Ashley's wetness. Ashley just smirked at me and winked.

"Dave, it's not what it looks like!" Jennifer said, fear showing in her eyes.

"Join the party, Dave," Ashley said.

"No!" Jennifer turned to Ashley, even more shocked. Ashley just smiled at her and patted her cheek.

"It looks like you're going down on my sitter. How come you've never gone down on me? You always said you were saving yourself. Saving yourself for girls?"

"I can explain."

"I think you better do more than that."

"Like what?"

"You owe me a blow job. Give me one and we'll talk." Ashley sat up and licked her lips, staring at my cock.

"What? No way!" Jennifer's face was flushed with embarrassment.

"I'm sure that Ashley will give me one, but you'll have to watch. Choose your punishment. Either you give me a blow job or Ashley does."

Jennifer looked back and forth from Ashley to me, anguish on her face.