If they both hate each other why any of them will care if she loves her or not?

Women are blessed with that sixth sense , which she can feel that in a very lil time how the other woman is feeling about her.

Plushed I'm married for 25 yrs have been in these situations a few times.

Sometimes it needs one person to make the first move and give a little. Otherwise Perhaps it's better that your brother's wife doesnt step in the house if she can't face the truth. Your mum and her seeing each other but feeling bitter inside