Without being completely outing, part of my sister's job involves going into lots of people's homes. We have a group whatsapp chat with our mum and although not the closest of sisters, generally talk most days get along fine. Today she posted a short video she filmed of a picture someone had up on their wall of their deceased baby and simply captioned "it's dead". This person was unaware she did this. I was horrified. gently told her I thought it was inappropriate and really unprofessional and I got a barrage of abuse back saying I was being judgemental and did I think I was the moral police. My mum said nothing presumably to keep the peace. She has form for being unable to accept any type of criticism but now I'm left feeling like I'm in the wrong and shouldn't have said anything. AIBU?