She is irritated that you keep asking. Women get that way when a male would just not shut the f*ck up and take no for an answer.
2. You try squeezing something the size of a Buick out of your pee hole, and lets see how your sex drive is afterwards!
Yes she is being rude, by calling you names and getting angry. But that's because you keep going at it. I think it has nothing to do with her being insensitive (in the way of not wanting to have sex) and everything to do with she just having a baby. Have you ever thought that maybe, she doesn't feel comfortable with her body at the moment? Or maybe she's depressed, and just keeping it to herself?