She doesn't owe him sex. He does owe her a real attempt to make the relationship work including but not limited to actual cooperation and caring about not making her life worse because he doesn't feel like getting around to fixing the laundry machine. Newsflash: women aren't sexually interested in men they don't feel physically and emotionally safe around. Don't take your partner for granted. Don't imagine they own you anything just because you are together or married. This works both ways, but men are a whole lot more likely to believe they can stop trying once they "have her." If you want her to continue to be your lover, you have to treat her like a lover - not a sex-dispensing machine that you are now socially entitled to and take for granted. Infidelity is unacceptable, but you both have to fucking try to keep things going. A relationship isn't going to run itsef.

I've been with my man for 35 years, over 30 of those married. It takes effort, but it's worth it.