Hi, needsomeadvice. I would certainly tell your son your suspicions (and why you suspect, let him know he's not "fooling" anyone) and decide with your husband what the two of you are going to "do" about it. Talking about it with him will do nothing, as you have seen, so I would decide your own actions, since only he can work with his:

https://www.psychologytoday.com/blog...-adult-addicts