Re: High level power abuse
Often we observe things without truly understanding the context of what we saw. I have no idea of what "Frank" saw and interpreted as intimacy and it could have been something that was totally innocent. It could have been somethng more.
These apparently are two rational adults who are responsible for their own actions and the fall-out. Frank has no duty in the matter and should mind his own business. Obviously, at least in my opinion, he shouldn't lie for them or cover for them IF something inappropriate is going on, but otherwise he should give them the benefit of the doubt and put his efforts into his own training and the example he wants to personally set on and off the mat.
If that is too uncomfortable for Frank, he should consider training elsewhere.