Based on this information alone idk. BUT if they stop in unannounced/have keys, or if he is dependent on them, I wouldn’t be interested. If they have independence and respect each others space it may be ok. But plz for the love of god they can’t be nosey about sex noises or who visits him
My ex did this and it was horrible I never felt fully comfortable hooking up incase they came by (they didn’t even have keys). His mom would also text him saying she saw my car in the front and asked why we were having sleepovers. It also was just weird to me that a man who was starting off his own life wanted to be right next to his family but that’s just my own opinion and experience