I mean, she's a real person; what do you say to her?
I would say: You matter because you were born. Had you never been born, it would not have been an injustice. The same goes for me and everyone else.
At least you're honest about that, but she would have suffered painful death.
I was a human being before I was born. Was it open season on me then?
I don't understand why there's such a debate on what the fetus constitutes at any given point, to be honest, as I don't see this as particularly relevant. Had I connected myself to you as you exist today for some sort of life-sustaining procedure like a blood transfusion, I would have the right to disconnect myself for any reason, even if it resulted in your death, simply because you have no inherent right to use my organs beyond what I allow. Restricting abortion ability like this is in my view morally comparable to forced organ transplants.