Well if she saw a TV show or read a book or was told by a friend about adoption, she has 2nd or even 3rd hand information about adoption.
If she's actually adopted children it means she has first hand experience with adoption.  
Someone with firsthand knowledge about a topic has experience and is much more believable, wouldn't you agree?

As for your last question "(and what it the child is a woman ?).", I don't have an answer. Is it a riddle?