Tbf only one person 'knows' for some reason as opposed to her just exaggerating things for sympathy but i wouldn't be surprised if there were bratty kids that are like "if you don't buy me x i'll accuse you/call the cops on you" or so XD but that kinda shit prolly would get a handful of asian kids disowned
Blonde girl isn't actually being abused, but she pretends that she is so the other girl will pay attention to her. The other girl is being abused (though not beaten) and makes herself feel better by focusing on the pity (and sexual excitement) that the blonde girl's injuries make her feel.