For the wife part: I think she owes something and I do hate her, do not get me wrong since I mention my loathing for Shane more often than now. However, I think she already is given her punishment of having her husband coming back, showing her still loves her, went through many perils to find her and now she has to deal with the fact that this man could potentially push her away but not his son should her infidelity come to light. I keep wondering how long the affair went on. Did it go on before the accident? After she was told by Shane that he died?
As for Shane, that man was like a brother to Rick, best friends and to see him go right after Rick's wife is a big no-no. I was surprised the graphic novel was changed but I can see why since people would have guessed what was going to happen next. However, I am glad to hear the actor who plays Shane also wants his ass dead.
My favorite episode was Vatos.