Getting husband in the mood for sex

Im ttc and so far the glow app has help alot . But everytime im fertile or ovalating my husband's screwed up work schedule has him too tired. He always blame how tired he is from work and that hes overweight. I would like to have sex at least 3xs that week but we only end up doing it once and it will be the day I ovalated. How can I make my hubby want to have sex? How to get him in the mood even if he's tired.??