meh. I hate that they made a big deal over HER (stopped before it was too late and when she was super vulnerable) indiscretion when he was a cheatin' asshole. MEH. That ruined it for me and honestly I hate it when the original couple stays together after the hell his "mistake" put them through. I would have rather her ending up with ANY of the other guys in the show. ICK. I gotta say that chick was a crazy one though. YIKES. Until the very end she was creepily stalking and ruining lives.
I'm also of the super firm belief that basically 0 relationships will ever be the same after a cheat. There is NO way you wouldn't have some sort of worry in the back of your mind that it wouldn't happen again. Does he smell like perfume? Was he really late just because of traffic? Business trips? noooooope. Once that trust is broken it may be glued back together, but the crack will always remain. And the relationship with be fragile as a result of that crack.