We were at a New Years Eve Party last night at my mum and her partners. I went to the toilet and asked my brother to watch my bag for me. About 20 minutes later I needed to get some money from my purse that I owed someelse there. I couldn't find it in my bag (I'd left it in the car). When I realised where it was I joked with me brother about my relief that he hadn't stolen it. My mums partner then interjected and said " (my brothers name) wouldn't have taken it, could you imagine if he got done for stealing and sent to prison he'd be tossed about in the showers like a dog toy" 
. Some of his friends then burst into hysterics at this and mum said "you are one you aren't you".
When I told DH about this he said its not funny but after a few drinks some people say things they shouldn't. My brother is only 14 and I think no matter what saying such a thing about your partner's son is totally unacceptable.