Sons friend is pregnant, help

My son has just told me that his female friend is approx 8 weeks pregnant.
They are not in a regular relationship and he doesn't want to be a father. She is 23 & lives in a hostel, her Mother has disowned her. She has no job, no money. She will not consider a termination.
My son is 23 & lives at home, he works but cannot support himself let alone a family of his own.
I have suggested that he should support her through the pregnancy, & ask for a paternity test when the baby is born.
will he have any legal rights once the baby is born? Or could she just disappear with it?
He wants me to speak to her. So I am going to meet her.
Do you have any suggestions how I should handle this?