This bit temporarily broke my brain:
"I'm not necessarily saying that I can prove they're not [my biological parents]... But I don't know that I can actually prove they are [my biological parents]."
I had to re-re-read it to make sure I understood what she was saying (it's still early where I am).
After I finally did, all I could think was, "...how the f**k does somebody say something like that with a straight face?"