I have a long-term friend who I've known since my university years. She and I remained in contact and catch up either to talk on the phone or for a coffee about once a week, but we recently became closer and she has started coming round our house for drinks semi-regularly as she lives nearby.
She met my husband about a year ago, but only fleetingly and met him another time at our wedding. However, ever since she's been popping round our house, I've noticed her flirting with my husband. She started sending him texts "just as friends" and enquiring about various things, and when she's in the house and my husband in the room, she suddenly gets all flustered and giggly and acts like a schoolgirl, showing off her (big) cleavage.
It does alarm me somewhat, even though I know my husband is loyal to me and to our marriage. He has even noticed her flirting and said it makes him uncomfortable when she comes round to our house.
I remember in our university days when we were in our 20s, she would do the same thing with my boyfriends or men I was interested in at the time. She used to joke about "stealing my men" back then but I just used to not take it too seriously.
Could I please have some advice? I don't want some big confrontation or a blow-up with her. I want to remain civil but also set some firm boundaries.
Thank you all.