Would you?

Would you hang out with a girl who used to hook up with your husband years ago? My friend is having a girls night, with like 5 ladies, including someone who has “history” with my husband. He never wanted to date her but she did like him. We all have a past that’s not the problem but I just don’t know if I could be quite as warm and friendly as I typically am. She knows I know which might make it awkward. Would you get over it and just go have a fun night? Or would you respectfully make up an excuse to not go?