I think Pia is very immature at times. But I don't blame her for telling off Seema Bhabhi. Seema is just looking for a reason to tell Pia off. I am married into a joint family and nobody behaved the way Seema Bhabhi has.
The only thing that irritates me is Pia spends all day taking everything to heart. Get over it,Go out and do something constructive.