First time poster. Sorry for the long post but it is relevant background.
I went out with dp tonight for food. We have known each other for around 18 months and dating for 4 months. When I'm in work or going out my mum looks after my dog. Had a really long week at work so my mum has had my dog for at least 40 hours this week (usually much less) and i felt very bad. My mum was happy for me to go out but did want an early night so agreed id come home by 10ish. Anyway we finished our food by 9.15ish and dp wanted to go on to a bar and back to his. I explained the above and that i wouldn't really be able to tonight. He seemed a bit sulky but starting driving home. The conversation starts moving on to when i move out later this year what will be the arrangement with the dog. I explained i would be working from home more but my mum would still be happy to have the dog if needed. He then commented that he was surprised as my mum didnt sound as though she wanted to do anything even though she doesnt work. I defended her but didn't want to argue. Its really annoyed me though that he thinks he can bitch about my mum to my face. Aibu? He does have some form for this as he made fun of my dad for being an alcoholic before.