Harry disappeared and Draco found him in a remote location?

Title is a bit vague because I wanted to avoid spoiling the fic.

I think this might have been the first Drarry fic I read, but I have no clue how old it is since this was late last year. Harry disappeared and Draco was trying to find him for some reason. He finally managed to locate him in France(?) in a remote location and it turns out Harry is a merman/siren.

Que some hot sex and Draco ends up pregnant with eggs(?). Ron and Hermione knew where Harry was all along and were keeping his secret, and they find out about Draco. I also remember there being a village nearby Harry's cabin/cottage, and Draco actually giving birth in the fic.

Hope that's enough info 🤞