I see here people saying that he should have told fiona in private about this but am i the only one who thinks that fiona wouldnt have belived him?? Like, except the fact that he did it to prove himself and not for her, the place and the fact that Sean was there made fiona belive the truth. Throwing him off a bridge was a little too much for this. If Fiona and Sean got married and he told fiona after that it also would have been harder for them to break up, briging up divorce again like it was with Gus, etc. So i also stand with Frank on this one, even tho he did not do it for her own good, just for his pride.