If .....
Sadi had gone with Mamaji then talked to Vasu that if she gets Ranvir to marry Ragini then she (Sadi) can convince Mamaji to allow herself to marry Aalekh, she would have been in a better position to get Ragini married to Ranvir.
Now....
it seems as though Sadi is going to be without her family's support, at the mercy of the Rajvanch's. Naveen and Avni are not at all happy about this marriage and will definately try to create problems for her.
With Mamaji and family against Sadi and Rajvanch's the main reason for Sadi's marrying Aalekh, which is to get Ragini married to Ranvir also seems to be a difficult task to happen.
So did Sadi do the right thing in marrying Aalekh at this time.