I agree with all of you that she shouldn't have been playing in the sitting room, we all know that if you have a ball play with it outside and definitely in the front they have a small lawn as well we see as they are coming and going from the entrance that space is there, lawn and driveway etc they could have played there, if they don't have a back garden. We saw that her behaviour of chasing each other with her sisters at the village around the jeep, so for her she doesn't know that you can't do that jumping around etc wherever you wish to do it.
Also Chaiyya was told by Shaila that they should not play with that ball in the house and her son should be there, she should make other arrangements and if the regular servant can't listen to Shaila who is the housekeeper then she is wrong, because just look after all the mischief she was able to take her son to the neighbours house so why didn't she think of that before, that the owners of the house where she works won't like it, the servant above her and who gives her orders, Shaila, has told her that she won't be permitted to keep her son there, then she should have made those arrangements immediately instead of waiting for the mischief to happen. What if he had broke something expensive it would have been coming out of her wages or worse it would be a dismissal for her.
So neither of them Laajo and Chaiyya were capable of doing the right thing at the right time that day, but surely now they've learnt something.