Re: "but HOW did daddy put the baby in your tummy?"
Is he 4?
we told our children that daddys/grown ups penis's have seeds in them and mommies have eggs in their tummys and that daddy puts the seeds into where mommies eggs are and it makes a baby. We told them that when mommies and daddys are married they get to make babies. That it is something that 2 people who love each other do.