What's the prevailing wisdom of women with more than two men, more commonly known as gang bangs?

My fiancee has a huge gang bang fantasy. It's a very common female sexual fantasy. How many women have experienced moresomes? Were they euphorically enjoyable? Would you do another? Should my fiancee keep it a fantasy?

My fiancee's girlfriend and her husband invited her an annual party at a private home at South Lake Tahoe. The home is on the water with a boat dock and boat. It's described as a mansion on the water. She is one of my fiancee's sexually adventurous friends who expends a lot of energy hiding her sexual adventures from her kids and family. Her husband participates. It's a week of nonstop sex, casino gambling, water skiing, hiking, mountain biking, horseback riding, and more sex. Five or more couples party, and, at times, single women attend. Single men are not allowed. It's by invitation only and among longtime friends. The girlfriend knows that gang bang is one of my fiancee's fantasies. The girlfriend has told my fiancee its the best sex she's ever experienced. My fiancee said if she goes, I'll have to go with her. The girlfriend was agreeable.

The only rule that must be agreed upon and strictly adhered to is no disclosing of identities of attendees. There is a strict code of silence.

My fiancee has not yet committed. She has months to decide. She has mused that we could go to be watched and watch others without her doing a moresome. I do know that my fiancee has often revealed in graphic detail her gang bang fantasy during sex.