Should I tell my husband

Asalamu alaikum wa rahmatullahi wa barakatuh May the favor and blessings of Allah subhanahu wa ta’ala be showered upon you for your kindness and guidance in helping to resolve this dilemma.
I have been married shy of 15 years. We are both divorced with children but do not have children of our own. The child of my husband is in upper twenties and receives a great deal of support from his father, he does  not have- or has he ever had,  gainful employment. He only visits about twice a year and he only does so when enticed by financial incentives. He has been hospitalized for substance addiction many times. He confided in me directly (and others) that he does not pray, fast, believe in organized religion and that he has haram intimate physical relations with other males. I feel that it is my obligation to inform my husband of these behaviors, but I am conflicted because Allah SWT encourages believers to conceal the wrongdoings of others. Additionally, I am certain that by informing my husband the father son relationship will be severed.

I have known this for many years. My husband is very critical of my children but not his own son. On many occasion that he has berated my children I have been tempted to reveal the facts about his son, but from the fear of Allah SWT I do not do so as I wish to only reveal this if necessary.

I respect my husband and love him very much. Essentially he is financing the haram lifestyle of his son. I feel guilty because many other people are aware of the lifestyle choices but he is not. I am concerned that he will eventually find out that I know and think that I betrayed him. I do not want to lose his love and respect, nor do I want to damage the relationship with his son. Can you please provide guidance for how to proceed as this situation causes a great deal of distress daily.