Ok, more of a WIBU.
Went on a play date with my friend and her 6 year old child. He's very spoiled by his mum and never shares his toys (he tells her to hide them and she does). He proceeded to be spiteful and mean to my 4 year old, calling him names, not letting him watch what he was doing. I let a lot of this go over my head as I thought she would eventually tell him off. Wrong.
One particularly mean incident I did give him a row and he ran over to her, hid his head and bawled and bawled. It took her 20 minutes to calm him down, didn't even make him say sorry. TBH I wouldn't care if you thought I WBU, I'd do it again. Oh, and apparently everything I said was (according to him, I could hear him shouting)...lies mummy, lies, everything SHE said is lies. I don't think I want to be in their company for a VERY long time.