Is there anything in the contract that says you can't hit your grown consenting subordinates?
Do you realize the liability that is? It is never appropriate to engage in personal relations with someone you work with. It is never appropriate for coaches, bosses, teachers, etc to engage in personal relations with students, players, etc. The other players can accuse him of favoring her, or she could get mad an accuse him of assault.
There are too many women out there to mess with the ones you work with.
(Especially when you have a wife and 3 kids)
Short term gratification vs long term results