We have friends who are a couple but she

Keeps hitting on my husband . Texting him privately and randomly calling to the house one day I answered and she was expecting me to be home. I try talking to my husband how it is making me feel but he won't talk about it. When the lads go out on a night she always joins them

It is making me so uncomfortable that i won't go out with them anymore . I can't say to her to back off as I don't have the courage

I feel lost 😥