I am about to deliver in a month and my mother has volunteered to live with me for a month. While my dad has volunteered to live with me for the next three months, since my mum works. I don't want to impose my child on them. How do I tell them that they should in fact, enjoy their lives and not worry about my child? Am I being silly?

I think it's not silly to ask for your parents to let you handle matters on your own. You already are an adult and about to be a mother, afterall. It's pretty normal that parents tend to be very protective of their child. Your parents are just probably either really worried or really excited about the baby. :) I bet it's the latter. I remember my in-laws eager to spend time with me and the first baby in my tummy a few months before I gave birth.