The God of Pain's Groom chapter 55.4 discussion

[Blackangel]

it looks like forrest is still trying to get a way to find more about the gods
and it looks like nana believes it's her fault entirely and i can't help but agree with her.

 

[Rinko]

She is the one who insisted River to marry Khoal
If it didn't happen, then River would still be with Forrest all this time.