I don't want kids 😌

My husband and I have been married for almost 3.5 years. Our coworkers, friends and family keep pinching us and asking, "When are y'all going to have kids?" "You aren't getting younger" and "You would be such a cute pregnant woman!" To which I say, "I don't really want any...ever." And then the alien looks start. 
My husband and I are both 29...he wants at least one..I'm the one hell bent on not having any. I work 12 hour shifts, and rotate days and nights every two months. I enjoy peace and quiet, going places with my husband at the drop of a hat, etc. I have 8 nieces and nephews I can see whenever I want. 
Am I an evil person for not wanting one? Because everyone acts like I'm this cold, unfeeling bitch because I have no desire to pop out a child. What's wrong with NOT wanting a child? 🙁