I think she is trying to find out what they are up to. She is happy they are getting close to each other. She has problem showing emotions. She is probably trying to find what is the cause of their closeness...is it love or something else? And if something else what?
But since son is married he should be allowed to do what he wants with his wife. She should stop asking why and just be happy!!! If Ahem is to be trusted with running the Modi empire and I think he can handle his passive wife just fine...
lovely post. I agree with your views. She is not going negative way at all. So far she hasn't done anything till now that brings her in grey light