Well, 'Brij-ji' has just got Sushma a new hotel gig, which she seems very uncomfortable about. So will this be the straw that breaks the camel's back, or will there be more?
If Sushma breaks away now after this incident and goes home all repentent and takes up the responsibilities that Sudha was doing, then it frees up Sudha, and enables her to not only recover, but also go ahead w/ her love life w/ Uday.
Incidentally, I'm hoping that at the end of this serial, Sushma is still single, and just taking care of her parents & dadi.