One of my neighbours is getting on a bit so about twice a month max I do her online shopping order and help put it away. She always insists I get something to 'treat' myself, I do try to say no but I know it makes her feel better about accepting my help, so I usually get a cheap bottle of wine (like £5/6, I'm not fussy!). This has been going on a while, maybe since covid, with pauses while I was pregnant & such.
Anyway, her son found out I've been doing this recently (I didn't know she hadn't told him, I really didn't think it was a big deal, if anything I thought he'd be pleased!), and he went mad, accused me of taking advantage of his mum and that I've essentially stolen £5 a month from a pensioner over the last few years. I apologised and said I wouldn't do it anymore but happy to continue to help her, but the whole thing has really upset me. I'm devastated that he thinks I was doing this for personal gain. I'm too embarrassed to tell anyone in case they think I'm some kind of wrong un. AIBU???