Both Couples are problematic. Hamsa and Warda are a mismatch..Warda is obsessively in love with Hamsa to the point where she can't see anything beyond him..Hamsa is a realist who loves his family especially his sister more than his wife. Warda should not have pursued Hamsa so crazily.
Salman is a slightly filtered version of his mother. Even without the sexual assault, it would have been difficult for Salman-Sameera's relationship to survive. Sameera was a shiny toy for Salman which is defective now and hence, his "love" for her ended abruptly. It's not wrong to succumb under pressure and break it off but Salman made a bigger mistake by marrying Sameera even when his heart and soul was not willing to accept her.
In conclusion, both couples are doomed.