Hmmm, the plot thickens. So I'll address the elephant in the room. Neither obituary of her parents mentioned Noreen, even though they mention offspring previously deceased. I find that very odd. The only other obits I've read on WS where the individual was not mentioned in their parents' obits was Ann Caldwell a college co-ed who disappeared in AZ in 1956. In her case, the premise is that AC left home voluntarily, LE found her and said they'd advise the parents, etc. after that heard nothing again. The people keeping her alive are those who think she met foul play or those who agree she left under her own steam.
So, we've heard some stories regarding NG's disappearance and they wildly differ. One was she was at her friends house but was probably kicked out because her friend wanted alone time with her boyfriend so she left. No reports of her catching the bus. Then there's the report that a family member saw her in a car, heard screams as the car speeded away. Now we've got reports she was pregnant, went to the US and had the baby and gave it up for adoption.
I'm not sure which one I believe but I also think someone is telling the truth and the other stories are actually a coverup of why she left. So it begs the question, if she was pregnant who impregnated her? I have my suspicions. I don't know how old that image is of Noreen but if it was a recent pic she was very young looking. Back over 50 years ago the onset of menstruation was much later than it is now. Probably around 13 years and usually took a couple of years to regulate making pregnancy difficult unless the girl involved had been engaging in sex on a regular basis.