Cats!

My fiance has a cat, but not a regular cuddly cat. This cat probably weighs 20 pounds and sheds her body weight in fur every day. She is very crabby and doesn't like my 2 year old. I'm worried about when Baby B gets here how she will act. I also don't like that she sheds sooo much and refuses to be combed or bathed! Any advice from anybody who has cats and babies?