I live with my partner & my 15 yr old son. Last month my 21 yr old asked if he could stay for 3 weeks as he was on a course with work near where we live. I said of course. But was slightly dreading it as my partner in the past has clashed with him. My partner was ok with it but had condition he pay toward his keep (£50) a week. And that he respects our things and doesn't swear. I was a bit embarrassed about asking for money but I didn't want a row with my partner. My son reluctantly paid me and I did feel bad. Any way the first week went well. My 15 yr old was chuffed to have his big brother around. My sons girlfriend came for dinner & stayed a couple of nights. Which I was fine with as he stays at her parents most weekends. But it all came to a head last weekend. My son & his gf were out. My son text me to see if we would like an Indian as him & his gf were getting one. I thought that was nice of him and told him what we wanted. He text back saying 'I'm not buying yours I can't afford it'. So I stupidly told my partner what he said. So when my son got home, my partner basically told my son he was being selfish & that it would've been a nice gesture. Well that got my sons back up. He swore then stormed upstairs and started packing his stuff and said he couldn't live with a control freak like that. My partner came up the stairs to try & calm him down but ended up making it worse. My son started shouting & swearing at my partner & getting up close to his face. The next minute they are grabbing each others throats and falling into the bathroom. I was screaming at them to let go. Eventually my son let go & held his hands up & said he was going. I was really shaken. I packed up my sons things & took them to him. I'm just glad my 15 year old wasn't there. I don't know how to move on from this. I was going to move out but my 15 yr old begged me not too as he doesn't want to leave. Me & my partner are talking but I've lost total respect for him. My 21 yr old is telling me I should go as he is controlling & a tw**. I just feel sick all the time. The thought of starting out again on my own is filling me with dread. Family gatherings will never be the same again. I have been with my partner for 7 yrs & only lived with him for 2. It's his house. The only positive thing is if I did move I would be nearer to my family , friends, job & sons school. Would I be disrespecting my son if I stayed? Would it look like I was taking sides? I just don't know what to do.