A young woman visits an elderly, the mother or grandmother of a man who is in jail for murder. They are very polite to each other and the old lady is very rich and posh. She is patronizing the young woman and confronts her that she only came to gloat over her and her son/grandson misfortune. Then the young woman is talking about this encounter with a man, who I believe is her brother and he is also in prison or on trial (I think). She says that the old lady has gone totally mad.

The scene is from a relatively recent movie or tv series (2000 onwards), is in english, has a very hbo’s “sharp objects” vibe and I have this vague impression that is widely popular but I cannot remember the title or the rest of it (I am sure I have seen it entirely, which is why is so frustrating).