My mum looks after my 3 children at our house whilst I work on a Wednesday (I'm a nurse) and OH is a teacher. My eldest is 13 so does her own thing and it's then my 7 and 2 year old. So I have been sorting out my garden for weeks, weeding, cleaning, putting down nematodes to kill leather jackets, grass seed etc to make it a lovely garden for the kids. Well today I got in and my mum had been sat out with the kids and allowed them to trash the garden. Mud up the fence (I just painted it) my son has dug a hole in the soil, filled it with stones that were on the border and buried it and then flung a load of stones all over the grass. He knew it was wrong because when I walked in he was very sheepish but he did it because my mum let him get away with it. I'm so disappointed and upset like why bother, so disrespectful, I want to say something to her but I feel like I can't because my mum does 10 hours free childcare every Wednesday and if it wasn't for her I don't know what we would do. Would u say something or just accept shit like this will happen and it's free childcare and I should be more grateful? (Btw son has had a serious bollocking!)