How to respond when people keep telling you to have another one?

I would like some input on how you’ve responded to anyone that asks (more like TELLS) you to have another baby.

My pregnancy journey was very rough and I had a traumatic childbirth, both for myself and for my spouse. We decided that for both our mental health, we are one and done. But for some reason, no matter what I say, I have family and friends trying to convince me that I don’t actually want just one.

How have you responded to others to make them drop the subject?