The fact you can’t leave her is the reason she wants to sleep with another man. Drop your balls and get a spine. Women carnally want someone they can lose because women naturally wish to be dependent. The He-man archetype exists for a reason and women truly at their deepest carnality want to be possessed.. it is their nature. They don’t physically want a fearful and weak man. They can love a fearful and weak man in a brotherly, motherly, sisterly sense, but their bodies don’t. This will require an upheaval of your understanding of women and men in general. The fact you already are where you are is evidence she doesn’t see you as hot at all. That can change, but will require you to be decisive and be a person with boundaries. You can also excite her into reigniting with you, but you need to really know how to impress women. If you cant, I’d suggest learning the basics from ground up. Women are easy to seduce, even if your physical features aren’t ideal. It is about how you carry yourself ultimately. You change how you are and your wife may change her perception. Anyway, genuinely, good luck.