Mine are doing scarily well. I keep waiting for the tantrums to start but so far so good! I think it helps that they have each other, and they are a bit older, so they dont need me so much anyway. They are also used to me being cranky and less available because of the pregnancy... I think they are getting more of me now, because I have so much more patience!
In any case DS is totally in love with the baby, begs to hold her as soon as he gets home from school, etc and is being a real help with DD1. She likes the baby too but I think she is waiting for her to DO something, she thinks she's kinda boring (which, right now, she is! lol).
I'm sure both of them will love having my mom here starting Sunday and then maybe after she goes the novelty will have worn off, the baby will be awake more and more needy, and then things will be difficult? We'll see.