I think she's sleepwalking into an abusive relationship. He tries to split her from her friends, when she does go out with them he's texting her constantly. He's slagged off all our family and now he's stirring up trouble between her and my youngest.
I may be wrong but I said to her that he won't be happy until it's just him and her and it wouldn't surprise me if he suggested that they move away so she definitely has nobody.
He can do whatever he likes and go wherever he likes. If they go out together, she always pays.
Is this a standard practice for certain types? What more can she expect? Am I right to interfere?