Yes, people move on- NOT within a year after that tragic death/murder of own love !!
I don't have any problem accepting that meher is willing to stay with sarab….
if reason is RESPECT/appreciation: he accepted her whole heartedly in family with Karan in that situation.... OK understand.
He is a gem of person (NO ONE can be that nice in real life, at least would ask for who/where is the father and why she is marrying him instead - again this is itv).
I can not accept that she forgot what happened to manav, even after seeing VD (she didn't recall/regret) !!
More logical would be:
after Manav gets memory - they show proper conversation(about what happened) between all 4 (VD -his wife, Meher and sarab) … meher tells them all.. she will stay with sarab as he is the one stood by her when she needed him the most (they are her family now)..... apologize to manav for what happened to him because of her... send KK to jail (for AOM)…. and move on !