Friends with benefits's friend's invited me to a Christmas Party - chance to meet Eskimo Sisters, what would one do?

Im friends with benefits with this guy for almost 2 years, this past weekend, his friends invited me repeatedly to go to their big Christmas party, where my guy's previous flings/ex's will be there. I have never done a friends with benefits, and haven't seen anyone do it for this long, so I am wondering what my decision should be. I have retroactive jealousy from my anxious nature, and don't know if this will be healthy for me to go. On the other hand, given this friends with benefits is about 2 years old, and I have met his friends before on a few occasions, this can be an opportunity for me to meet more people.

Some additional information is, my friends with benefits did hear the constant invitations from his friends for me to come, and the one thing he asked was "am I ready to meet my Eskimo sisters"?

TIA, Happy Holidays

Friends with benefits's friend's invited me to a Christmas Party - chance to meet Eskimo Sisters, what would one do?
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