Unpopular Opinion, Murtasim marrying Haya out of revenge actually makes more sense to me then him suddenly marrying her out of pity or anything. Why he is actually the one to initiate the marriage rather than being forced into it.As per his POV, she has gone/runaway with Rohail, so to take revenge from her he marries the woman who Meerab hates, goes with the OST as well. Him giving Haya everything that she, Meerab, threw away.
The whole scenario that he is doing this to force Meerab out of hiding doesn't make sense to me if he think shes with Rohail, in both cases.
1. Scenario 1: If indeed Meerab has run away with Rohail, why would she care if her marries somebody else, why would she come to stop the wedding.
2. Scenario 2 : Rohail has forcefully taken her, why would he let her go to stop her husbands wedding, what would he gain out of it.
As per the story, what Murstaim thinks atm, revenge makes the most sense.
Not the most ideal scenario, but better than suddenly realising Haya's love.
742