We started out watching porn together and over time, I started showing her videos of swinging, threesomes, and hotwives. And after months she asked If I could handle watching her with another man. I was honest with her which was hard because I didn't know how she would react. She was the one who suggested that we swap with her best friend and her husband. And she was hooked, We swapped with them quite often and then with her cousin and husband. Both of those relationships ended and I started sharing her with my close friends, who I could trust, and the very rare stranger. Communication and honesty will be your best friend, but planting the seed will help.