Firstly I'm extremely grateful for my mums help, once a week before DH gets home she watches DD for an hour. DH picks her up on the way home from work. I work evenings and this particular day once a week I start earlier than usual. However I'm getting sick and tired of my mum using the 1 hour a week childcare as an excuse for EVERYTHING!!! If she doesn't want to do something for her mum or with friends on any day of the week at any time, she says "oh sorry I've got granddaughter then", rather than just tell the truth. They all know I work evenings only and I feel like it makes me look really selfish. She recently just declined going to a funeral because I'd "asked for her to watch DD while I go shopping"- this is a bold face lie and makes me look like a selfish cow! I'm really grateful for the hour once a week that she helps but I have never asked her to watch DD any other time. AIBU to be annoyed by this or should I just suck it up and let her say what she wants seeings as she does help me once a week for that hour that I'm stuck?