Divorced for more than a month, the ex-wife still has the key to her house. She called her son yesterday, but he didn't answer. She called me. Then at noon, she came back to find her son.

Depends on who his ex-wife is. If you are a sensible person, then the next time you bring your girlfriend and introduce her, she will naturally understand that she is gone forever. In fact, your friend cheated on himself, which is unbearable for most women, but he is a man and the divorce is his wife's. ...