No you didn't reach your goal. Losing weight was a good idea because men generally do not like fat woman but you also lost your husband. A lot of men when they reach middle age and over go through a male menopause and must have a younger girl to make them feel young. You should lose weight but not for him. If he really loves you, he would make the sacrifice and be patient while you lost weight. Meeting someone else tells me he was straying and it had nothing to do with your weight. You should be losing for yourself.
After his is kicked out on his butt then the two of you should go to marital counseling. She probably thinks "oh, i love him and he's my son". He is taking advantage of your wife and she holds on to make sure he still loves her. His priority is himself and he will continue as long as you let him. Best thing you can do is let him hit bottom. Perhaps a therapist can explain what is happening and why she keeps holding on.
I'm tired of hearing about him. He needs help but he needs to be in the limelight too.
it happens a lot. doctors and nurses know patient is suffering and has little time left. They keep increasing the morphine until the end.