u/-Mountainbread

I once read an ebook around 2018-2022 and the story was about the female protagonist went on cruise after her fiancé/husband betrayed her. Her cruisehip was hit by a storm and it sank and she stumbled upon a cave and she saw a male nymph/prince/mermaid/demigod (forgot what was he), and the man was mutilated from the waist down so he can't escape. He was held captive by a female villain (demigoddess/nymph/immortal) and used a sx slve. I remember I was not able to finish it because the ebook was not finish.

Anyone here might have any ideas with this? Thank you!