I think Ragini should explain in a very simple and understandable way, that both are good. Like for humans, both eyes are important and favourite, one cannot choose...such are Khushi and Tamanna for her.
Ragini today is in the same situation as Mamaji. Mamaji's sanskars were so good that she never allowed any rift to come between Sadhna and Ragini, at least till they were both with him in his house. Today, Ragini has to become like Mamaji.