Last year my 17 yo son in law was living with his mum but would visit us a few days a week after school or weekend as we live close. His mum decided to move away with her new partner but SIL didn't want to due to college, friends, girlfriend, being happy here... so he moved in with us. He was really upset about his mum moving. He complains about her a lot when I dont care to hear about her. She is a lazy and selfish person. Cant understand why he is upset she has gone because there are no good qualities about her. He was always a decent, popular and well respected boy but he changed when his mum moved and started drinking, smoking weed. He dropped a college accounting class and business class that he was doing really good in and just attends college for art classes now, which I can't get my head around lol. He had said for ages he wanted to go on to university and do business. He started earning some income working with a friends dad to contribute to us which was really sweet but he would go out most evenings and ignore curfew. He ended a 2yr relationship with a really lovely girl and told me it didn't work out but she told me it came from out of no where. He then started seeing a 38 yo man. He said he met him through school. He was a sub teacher. We were shocked because he has only had girlfriends and never shown an interest in men before. 20 yr age gap seems excessive to me. He wanted to introduce us but me and his dad put it off for a while as we didn't see it as anything serious. We finally met him and he was ok but the age gap is uncomfortable to me and how he suddenly left his girlfriend. The situation is weird. Few months later Covid happened. SIL has been regularly contacting this man... phone, video chat. He says it is serious but I'm not sure if I should take it seriously? I can't see it lasting long term and I want to be honest with him without hurting his feelings. His dad doesn't care either way. I just think it is a fling because he is bored or seeking attention. Could he be doing it just to get to his mum? Things changed for the worse after his mum left. Is he after her attention by rebelling? Should I encourage him for his relationship when I can't take it seriously and don't see it lasting or tell the truth?