The one on his right is his mum. Could be his girlfriend as well though if we were in certain Southern states in the US, or Manchester (not SC though, obvs ).
The girl I know, when I knew her, did live in a trailer. Her Dad owned a trailer park... Her trailer was actually really fancy inside though. Nicer looking than most traditional homes. She had a very distinctive surname...grandparents from a small isolated mountain town in North Carolina. She met a guy... Same surname whose grandparents were also from that same small isolated mountain town in North Carolina. They started dating-found out their grandparents were siblings... Kept dating anyway. Got married. That was over 20 years ago... I did Google stalk her a few years back to see what happened as I had lost touch with her years ago. They're still married, different part of SC with 3 kids.