Apart from that, if you look at the nude pictures closely in the area of her teeth, you can see that her upper left 2nd incisor is crooked, just like Stanley Ann's was at that age.
That's the way it looks to me, but like I said, she may already have been pregnant as of before Halloween which is over a month before these Christmas-time pictures were taken.
Let's just say that this is a picture of an 18-year-old more likely to either get or be pregnant than your average girl the same age of that era, and this further supports the likelihood that she is Barry's mom regardless of who donated the sperm.