What sort of a husband is he? Is he caring, supportive, does jobs around the house, takes you out and on holiday, compliments you etc? Or, is he very self involved, still has emotional ties to his earlier life? Was it her fault the marriage failed or his? Other people involved at the time? All this is worth considering to see where you feelings arise and whether there is another trigger. When the basics are in place i.e. security, companionship, care, shared interests, his former life should not be at the forefront but if you are aching to go do your own things, perhaps your feelings are telling you something. They always tell us not to ignore our gut feelings. Is the first wife flaunting her new life etc? Good luck at whatever decision you arrive at and remember that you are entitled to be happy whatever the journey ahead.