The other timelines might not seem important at first, but look at it from this perspective:
1st timeline: Both MC and ML are toxic to each other. They both die tragically, marking the end of their doomed romance.
But readers weren't satisfied because it was just too tragic! So...
2nd timeline: This is for readers who wanted Aeroc to have a happy ending. It’s basically a gift from the author after everything he suffered through at the hands of 1st timeline Kloff. Here, Aeroc gets together with Kloff before any tragedy happens and they end up having beautiful kids together.
3rd timeline: Even though 1st timeline Kloff gets to be with this version of Aeroc, the author punishes him with unbearable regret and longing for the original 1st timeline Aeroc. Everyday is pure hell for him, seeing this Aeroc smile while constantly remembering the tragic, broken face of the Aeroc he destroyed. Plus, they don't have any children in this timeline.
TL;DR: Each timeline gives the characters their true ending. Aeroc finally bags the man and the family, while Kloff gets a sad ending across all realities, just with different magnitudes of pain.
Damn this one made me tear up way to many times with all the pain he went through. He was in love but, because the other was a alpha an had to much pride an disgust of alpha’s with another he ignored his own heart and put him through so much an called him the devil when in fact the devil was him an not the lord felt so bad for him. An cause the lord was always punished for showing weakness he couldn’t cry until his death bed an able to say what he truly felt.. happy they had a chance to change that by time going back after the real devil died. Not sure why it needs more when in final was truly the happy ending.