So I had a text from a friend today (she's a school run mum so not actually friends more friendly) asking me to pick up her ds (4) as there was some sort of emergency at work. No problems, he's been here before and she's had dd over before. Playdate was fine, fed him a light tea, him and dd decided to play dress up, he put on fairy wings and tutu.
She came to pick him up, thanked me. Then he walks down the stairs dressed as a fairy. Her face instantly sours, she says 'ds you KNOW they're girls clothes, take them off and get your shoes' I wad 
but didn't say anything. Me and mum make stilted small talk, they leave.
I've just had a text "hey thanks for having x after school ur a lifesaver. but i wasnt happy to see him in a skirt! next time he comes over can u make sure he only wears boy dress up sure you understand xx" 
Help me reply, because I'm still scooping up my jaw!