What bala tali? Meera's reaction is completely justified because she's been told they've asked for dowry. Hell, any modern girl would react like this and not be the same old docile version they want her to be.
And Meera didn't even do anything outrageous, moreover it's the older Sakhujas who need to get a grip over themselves. How the hell did they slap anybody? Who gave them the right? They are older so they could've sat down and talked it out with krishnakant. No sane person goes on slapping people.
No matter what the reason is, any person will flip out if some random person slaps their parent