Regarding Tash….
I don’t think that James is necessarily the forgotten child. I think that if he were as receptive to attention as Olivia clearly is, Tash would plaster him over her social media just as much. He seems to be a sensible young lad- at least I gather from the limited info she gives about him- and he clearly isn’t one for milking mummy and daddy. Naturally Olivia is quite happy to go along with whatever Tash wants to do because she’s gaining from it.
Good on James is what I say. You just know Tash was probably rooting for an Oedipus Complex so now it LOOKS as though Olivia is the golden child but really, the other one CBA with her smothering him.