Op...most real men accept changes in the wife's body after childbirth. Most husband also do comment about the weight,sometimes because they worry about her health and sometimes because they feel the attraction waning. Unless and until the wife has become grotesquely obese...no man stops having sex because of weight gain. The only reason a normal man will stop sex is if he has some physical,sexual ,mental or emotional issue. Or if something has happened that has made him develop hatred for her. Or he is getting sex elsewhere. Most couples deal with each others physical flaws and changes in a normal way. Infact it is women who become more conscious of the weight . With the arrival of children and physical flaws,most couples use light dimmers or switch off to keep the action going. What ever the case..your husband is the one who is acting abnormal. Like others have written...reduce the weight for your health because you deserve good health. Your husband may or may not respond positively to it because he is the problem.