Having sex with pregnant husband is gross

Patient: Had an hysto two years ago. Before then sex life was OK but now my husband has put on weight and sex isn’t the same. He looks like he is in his second trimester of pregnancy. I told him it doesn’t feel the same since he’s added on a stomach. He’s went from weighing 22 to 344 lbs I’ve told him to lay off the sodas that contributes a lot. What other things can make him lose weight..having sex now is like a chore