I just need to check that I'm not going insane as this AIBU does seem petty in the extreme. My mum and MIL call my DS their baby. I wouldn't even be as upset if they said 'our' baby. I've just come hom from MIL and she must have said "how's MY gorgeous boy" about five times - and to me it seemed the more I was becoming clearly annoyed the more she was doing it. I realise this all sounds ridiculous - I just wanted to check this wasn't PND and if it would upset other people.