I didn't say anything wrong it's just use of words one of them is gonna disappear at near end so I warned polygamy lovers about that scene. I said brace for impact for that near end scene and I really know how this ends . So I just wanted to keep audience at edge so that when they read full ending they will be satisfied. I didn't say anything about ending in my spoiler though.
Having looked over the raws for the last chapter...
She does disappear, and it's terribly sad, but then it immediately cuts to a celebration some time later. Afterwards, the two of them go back to the lake and she's brought back? I'm not clear on the specifics, and it happens so quickly that there's no real time to process it before the chapter ends. She's about to fall into his arms, and then that's it.
Friggin' kami. Man, I'm so glad deities aren't real. Life is challenging enough without all of their nonsense thrown in the mix.