Dont want people to visit so soon

How do I tell my dad and my step mom I dont want them to come right when my baby is born? I have my mom staying with us to help. She has been so helpful. I think the first few weeks my hubby and I need to be alone with our baby. I know my mom will give us space, but other ppl are too pushy. Ive already told my dad he needs to wait until Im ready, but he doesnt get it. What should I do?