My 39 F ex-husband 43 M cheated on me with my brother 44 M and now he seems to be in a serious depression.

I was married to my ex-husband for 9 years. We got divorced 5 years ago. I was about 4 months pregnant and went to the doctor, when I returned home I found my older brother and my husband together. It was really disgusting to see.

According to my ex-husband, he and my brother took drugs and he doesn't remember how they got into that situation. My brother is gay, but I never knew if my ex was gay or bisexual or anything like that. I filed for divorce and we share custody of our daughter. We have been cordial despite everything. We spend two holidays a year together, the three of us.

Since the divorce from my ex-husband he has been quite depressed, at first he looked for any excuse to talk to me and be with me but then he realized that it was not going to work. In these years that we have been divorced, he has seemed quite depressed, tired and talks less. He also gained too much weight, he didn't go to the gym but he was a pound or two over his ideal weight so he was at a pretty decent weight, now he weighs around 280 pounds and I'm really worrying about him. I also discover that he recently lost his job, that he is staying with his sister, and that he is one step away from being diagnosed with diabetes.

I don't know how to tell him that I am worried about his health since the last time I did it he misunderstood thinking that I would give him another chance, which is not the case.

How can I help him without misunderstanding the situation again?