Urmi has been brought in to give a final push to Nimboli to run away from this hell. Till now, due to her innocence or ignorance, she doesn't think anything wrong or injsutice is happening with her. All she knows is Kundan tries to touch her, but apart from that, Harki and Akhiraj's behavior seem normal to Nimboli.
She doesn't even think it is wrong that Kundan married another girl, depsite Nimboli being alive. She never questioned it. In fact, she thinks Urmi will be like her sister. Urmi will make her realize that Nimboli does not belong in this house and with Disa's and Anandi's help, she will try to get out of here.