My husband mingles with his brother’s wife

Question

Alhamdu lillah I have a good salafi husband but I am worried  about something. He has contact with his brother’s wife. She doesn’t  wear a hijab and she has my husband’s number and calls him so many times and my husband talks with her as if she was his own sister subhana Allah.  Sometimes my husband goes to her house when she is on her own in order to  give her food and so on. Also, when she is with my parents in law we sit all together, me with my brothers in law and their wives and then my husband speaks with her freely. Please tell me what I need to do to stop this.

Umm Abdel-Malik:

You have to advise him and to clarify to him that mixing with her is prohibited and it’s one of the great sins and that indeed talking to her without a necessity is not allowed as well as to look at her.