I work in an office where there's a small group of women my age. We eat lunch together a couple times a week and chit chat mostly about work stuff, though as we spend more time together it's only natural that the personal stuff has started to surface more often. Most of the girls are in serious relationships and I'm just starting to get more involved with one guy, and there's one girl who's all over the dating scene and is constantly over-sharing the intimate details of her nights out. She gets really raunchy.
She's only been working here for a couple months and the other girls are all ears when she dishes about her sex life, but it makes me really uncomfortable. I don't want to exclude myself from the group lunches, but I'm also getting sick of losing my appetite every time that girl opens her mouth. What should I do?