she never said she want lux back but she said that she want divorce from sanskaar just because she doesnt love him as of now or not yet realised it..
she is clear that she will never go back to laksh but she is also afraid to begin a new relation and that is why she is taking divorce from sanskaar though he loves her as she might fear that she may not love him back. then both will be in unhappy married life. she might prefer that than that sham taking divorce is better.
but in sure once she realises she loves sanskaar she will fight and will never leave him at any cost.