I used to live with a woman who had 2 boys. Older 18 and 27. They seemed to be attached to their mom’s hip. Never thought of moving out. Never paid rent never did much of anything. No responsibility. I still think to this day that it is unhealthy for this kind of codependency. Unless mental health is a factor. Lazy unmotivated unable to take care of themselves make them dependent on you to solve their problems. She left since this arrangement was not in my or her best interest. But being a mom she could not turn her back on them. So it goes on indefinitely. Not good. Stressful too.