So with ch 49 backing up my claim, it seems that back in chapter 1 after Carnephelia died, he used his divine power to turn back time which resulted in the younger ver of him falling ill from the repercussions of using too much power. Also I was able to read a translated snippet of chapter 1 which this manhwa didn’t go into depth much but basically when she was close to dying he picked her up and kept calling her name and idk if im making this part up since it’s been so long but i think he cried as well? Anyway Sven fell in love with her after realizing she wasnt like her family.