MIL has DS2 one day a week and does a brilliant job. He loves going to her. He has only ever had one hair cut over a year ago. His hair is very wispy and curly so it is not that long. I am not specifically growing it but when DS1 goes to the hairdresser we ask if he wants his doing and he always says no.
MIL sent a text to me at work confessing the cut saying it was in his eyes. I got home to find she has cut a fringe but also all the back. Its still quite long but more of a he-man style bob.
I am suppressing some annoyance but AIBU to just let this go. My instinct tells me not to rock the boat as she is an incredibly stubborn woman but I also don't want her to do it again.