My DM looks after my 15 month old a couple of days a week. Both days this week I've come home to the baby in a dirty nappy. DM has said she thought the baby had done a poo. So why not bloody check then? I'm grateful for the help of course but really upset as baby's bum is now sore and I've tried to talk to her about this before without success. Any advice on how to broach this?