You may be interested to lose weight. You can do so by doing yoga or other exercises. You can learn kegel exercises. It will help you to strengthen your vaginal muscle. You can contract vaginal muscle during intercourse. This action will give him more pleasure.You can change your posture, (you be on top). This will help you to adjust your abdomen for proper alignment of sexual organs. In this posture you will be able to rub your clitoris with the dorsal part of your hubby's penis.You may google to find different postures for sexual intercourse.These are few suggestions. In the internet you will find many website suggesting exercises to improve your sexual performance. Your husband can also do some exercises for improving your his sex vigor.If there is enough sexual drive,abdomen swollen abdomen of a woman should not be an obstacle. Male can always adjust sexual pose if he really sexually aroused.May be that his sexual desire(libido) is much reduced.So may need to enhance his libido by doing some exercise.
You may see the video on Pillates and Libido part 2 given above. It might contain some suggestions to help you. It appears to be good video.just try.