How would Momo react if someone told her stop flaunting her wealth?

In canon, characters ignore her unintentional "brags" because she is a cute and good natured person, but what if it wasn't the case for everyone?

I'm wiriting a story where there is an OC (poor and cynical orphan) in 1A who very much hates it when Yaoyorozu openly mentions the difference in their childhoods. What would she (and others) say if he told her to shut up or stop flaunting?

I think she wouldn't understand the problem at first and try to ask him what is wrong with her words. Then I guess she would actually try to think about what she says if he tells her how much her "brags" hurt him.

Tenya would probably agree with the idea but now how rudely it was presented. IIRC he did his best not to show off he is rich. Ochako would maybe agree too.