In Dean's mind he was trying to rationalize this situation. The word threesome seemed a bit trashy, but he had spent so much time in other countries-- like France-- with open-minded artist types. He tried to separate love and sex at least for Shareen.
Daphne grabbed him and kissed him and he let lust take over. Sex was natural and there was nothing wrong with a little experimentation. A hand was on his thigh and from the angle he guessed it wasn't Daphne. He focused on dividing his attention. One of his hands cupped Daphne's face, the other reached to his side and landed firmly on Shareen's corseted breast.