Is it wrong if I (35M) don’t want my fiancé (33F) to include her best friend in our wedding party she had a threesome with?

My (35M) fiance (33F) wants to include her female best friend in the wedding party as her maid of honour.

My fiance has a very promiscuous history which was nude to accept. She had sex with her female best friend and a male FWB before we met, she did it in a tent after a wedding reception which I am really bothered by. This really bothered me and I considered ending the relationship because this woman will never be out of my life. She’s a package deal as she is her best friend.

Her best friend got between my finance and me, trying to encourage my finance to end it because she didn’t think I was good enough for her. My fiance told me she has bashed me several times behind my back.

My finance and I on-line separately. Worst of all, my fiance rents out a room in her house with her best friend. My fiance told me she didn’t enjoy the experience with her because she doesn’t like girls and hasn’t done anything with her since. How should I go about dealing with this?

EDIT: the reason I’m bothered by how she had a threesome with her friend and previous FWB is because my fiance was drunk and she’s so cavalier and easy going that when her friend pressured her to join she caved and joined in. Her friend is a chronic cheater, cheated on her last partner with 7 people. Also, slept with her boss (who was engaged) and tried to steal him away from his fiance. Her friend is a terrible influence.