I can't see Hughes cheating on Gracia at all. But there were some very intense feelings between Roy and Hughes (strong enough to make Roy go berserk!) whether they were acted upon or not. Whereas he hardly treats Riza any differently than his other subordinates (and I like Roy/Riza - or I like it from the anime).

I think what annoyed me the most about the hate!sex comment was, has that person taken a good look at the way Ed interacts with Winry? His supposedly canon "love interest"? And they call Roy/Ed "angry hate!sex"??