Dominate them

"Come here", you order.

Lucy and Josh step towards you, dropping pillow and blanket, respectively. You let your gaze drift over them. You've seen Lucy naked dozens of times. Her round breasts and her slim figure are as familiar to you as your own body. You could probably find the small mole beneath Lucy's left breast without looking, if you wanted to. On the other hand, you haven't seen Josh naked in years, since you played sports together in high school. Since then, he's bulked up, putting on muscle and shedding whatever fat he had had before. The new look definitely suits him, which is probably why your girlfriend decided to have sex with his behind your back.

Your mind turns back to the problem at hand. You could have your own way with Lucy and Josh, or teach them a lesson that they won't forget quickly.