Goodness, I find this so very strange.
Part of me thinks she somehow concealed the birth to protect the baby (as is: She didn't have an abortion at all.). But it's just so odd.
And, yet, I find other parts of the story totally believeable. I didn't even know I was PG until I was 22 weeks with DS (and 18weeks with DD) and I didn't show with DS until about 36 weeks. Even then, I would have easily concealed it, should I have wanted to.
It is not against the law to terminate up until birth. I know this. For various reasons, I was offered genetic testing, as there was a chance of a life limiting illness. The testing came through at 36 weeks. I declined. But if I hadn't and a problem at been shown, I would have been allowed to terminate. At least that's how I felt it had been explained. I didn't really listen.