If you know the backstory of our poly family, sort of the same thing happened with us. I fixed up hubby with my friend Lora. She had a boyfriend Walter at the time with whom there was no expectation of monogamy, so it was ok. Eventually Walter and Lora started playing as a couple with the others in our poly family, Clair and Red as well. During that time, Walter and Lora got engaged, then married. But also during that time, hubby and Lora were falling in love, as well as a strong Lesbian relationship developing among Lora, Clair, and me.
Lora left Walter and joined our family. Actually, that's what completed our family.
There is nothing like the passion I feel in my love for her and the jealousy of her and hubby together.