Can Juliette ask for forgiveness, Nick et al accept it, they revert to the good old days and ways, and they all go off together into the sunset? Sure, why not? Its a fictional show whose writers determine the outcome. The real question is, will the fans accept it? I have seen parents/ spouces suddenly turn into abusive alcoholics or have break downs and develop violent mental conditions. Emotional, physical, legal, economic damage can result. When the person gets help and recovers and tries to make amends, some people accept it and return to "normal", others can not, will not and never anything to do with the other person again. This is a possibility in real real life, are the writers are good enough to make it seen possible is another matter.