Bobby Singh is too polite - Bheeji deserved a slap across the face for coming up w/ this lie, and so did Meeta. But if Bobby is pissed off @ this family, I don't see how it gets resolved by his asking for, say, Ishmeet's hand. And the family - if they laid down a simple rule that all the sisters have to marry in order, and an younger sister cannot leapfrog an elder sister to the pheras, that alone can stop an out-of-order marriage.
Both Bheeji & Meeta deserve to be blamed for lying to him. I disagree w/ Maris that they didn't cheat him - what else do you call lying about who all are in the family? Instead, they could have revealed everybody, but made it clear to him (and anyone else) that they won't be considering any of the marriages out of turn. Then if Bobby wants Ishmeet, then he'll have to wait until Meeta marries.
The family seems such a loser - particularly Meeta. She's singularly unattractive, which probably explains why she's being paired to a much older man who's been married b4. Looks like they're in a hurry to marry off the older ones, so that they get to the younger ones pretty fast.
Incidentally, is Bheeji the step-mother to all the daughters, or to some? Is the father married a second time?