wow sorry about all this that has happened to you,
you have every right to be p---ed off right now, i would feel the exact same way if i were in your situation.
My bf/fiance wants a dog, he used to have a husky/wolf mix but gave him away 2 years ago and he wants to get a new dog, but with our baby coming we've at least come to an agreement that we would wait for a year or so to go by and then get a dog.
I think you should sit down with your husband and diccuss how your feeling, a new mother should not feel like its always a battle between her spouse and Mother in Law, i would think his mother would understand your point and discourage him from bringing an animal into the house when there are already 3 or 2 dogs there 2 cats and a baby. As for the grill, i would say the same thing, and you should make it clear that you have another priority to make than getting a grill, a baby to take care of and they'll have to wait or buy a table grill or hey, use the oven! works just as well as a grill.
sorry you had to go through that again, it is not fair at all, but i really thnk you should discuss this with your husband and maybe he would understand more.
krystine