I too had a slutty dressing friend. Embarrassing to go places with her but I just pretended it didn't bother me but damn, it was really bad. Her favorite outfit was skin tight blue jeans, matching button down vest, no shirt underneath, padded bra, boot to the knees.
Then one day out of the blue we were at a nursery looking at potted plants when she said her husband's mother told her she was getting older and she needed to dress appropriately if she wanted her husband to climb the ladder. What did I think. I told her the truth.
Recently saw some pictures of her. She's aged badly but still has that slutty look. Upscale but slutty.