Well I knew it was going to happen sooner or later. Bruce finally had his way with Clark. I think Lex is suspicious as he did confront Bruce soon after. But so far nothing has happened yet. No fights, no accusations nothing.
I think the kids know because their relationship points with Bruce and Clark went way down! So they must have seen something. Although Bruce and Lex still have the want of being friends. Perhaps Bruce is going to seduce Lex too. Too bad this damn thing does not allow threesomes. *eg*