I agree Kimmie. My W entered into marriage with these expectations that things will never get hard, and when they did, instead of standing with me to confront the challenges, she withdrew and went searching for someone more "compatible". The problem is that it may take several years for her to leave, start a new R, and then realize that its work no matter who you are with. It is complicated though, and when patterns are engrained for many years, it gets hard to see beyond them and understand how to change the dynamic....old habits die hard.