How are we supposed to do this??

So my MIL, before my son was born, was never promised anything about being at the hospital before he was born. Well, it's two years later, and she brings up how it pissed her off/her hurt feelings how she wasn't allowed in the labor or delivery room. We only had my sisters, best friend and brother show up for that. My sisters and husband were in the delivery room. And never told my MIL she couldn't come after delivery, the hospital rules (because he came at night) told her that. No visits after 930.

Well, if she is still mad about that.. how are we supposed to

1. Tell her we aren't coming to Christmas with our new baby, who is due Dec 15.. who may even come late because she is measuring a week small

2. Tell her we want everyone to wait a day or two after delivery for visitors? Like a full 24/47 hours?

3. She can't kiss the baby. Period. Because she is known to be sick right at Christmas. But, that rule even goes for me.. who knows if I could even pass sickness to my own child.

And how do we react if she has a negative reaction?? I don't know how to even break it to her. And it's not just her were doing it to, it's all family, on both sides. She just has the most negative things to say usually when we tell her a decision and now I feel were in a hard spot.