In the early days of our poly family when it was just David, Red, and me (although Clair had become a regular play partner with us) I was still looking for women who were interested in having sex with David. Lora, who is black, accepted my invitation to play with him.
She had at the time just started dating Walter, a black guy. Long story short, Lora was honest with Walter that she was fucking my husband, that I knew, and Lora and I were doing the Lezzie thing as well. He was fine with it (similar to how David was and is with me still fucking my ex Red). Eventually, they started playing with us (David, Clair, Red and me) as a couple.
Lora and Walter got serious as this was going on, got engaged, got married. But I could see that Lora and my husband David were falling in love. When Walter got a great job offer on the other coast, Lora decided not to go with him and they got divorced, and Lora moved in with us.
Despite David being my husband, he and Lora are the couple in our family. But it's ok with me, David still loves me as much as ever, and I love Lora too.