Abandoned by My Fiancé, Chosen by Three Sirens

I thought I was guiding three stunning mermen to find mates. Instead, I ended up belonging to them. They were never mermen at all, but Siren triplets who share one mate for life. Before I could get away, they pulled me into their underwater nest and kept me chained there. They refuse to let me go until I’m carrying their babies. And then something came back to me—I had met them fifteen years ago and made them a promise. I forgot. They never did, and they’ve spent fifteen long years waiting for me.