Greg jerking off in the bushes

Seeing movement behind some nearby bushes, you move closer and find Melanie's husband hiding there. He's got his pants around his ankles, and is rubbing one out while staring at his barely-clothed wife. Greg hasn't noticed you yet, and Melanie hasn't noticed him: the bushes are thin, but she's still lying on the beach towel with her eyes closed.

"Hey!" You shout, getting both of their attention. Greg tries to pull his pants up, but doesn't make it in time as Melanie looks over.

"Wha--Greg?" Her eyes widen as she sees her husband's exposed cock. "What in God's name are you doing!?"