If I come to India from US on a 1 mo vacation,should my MIL call me or should I call her? Plz reply, going mad?

Well, if you are supposed to show her respect, then maybe calling her again is a good idea. Even if she is too busy or far to see you, you can tell her how your visit is going and maybe she can ask how you are going. If you are not sure, asking your husband might be the best idea. He could tell you whether calling is a good idea, or whether he should talk to his mother about it etc. Good luck, hope the trip goes well.