Yes, I also found it interesting that JoAnn was only 17 when she had Adrienne and was just 19 when she had Alexandria. I'm estimating since I haven't tracked down everyone's birth dates.
Here's where it gets a little crazy. Mr. X claims to be the father of Adrienne and Alexandria. A quick look at the photos, though, indicates that Alexandria and Kyliyah had the same parents. They look almost identical to me. And I'm comfortable drawing the conclusion that Mr. X was not really the father of Alexandria.
But Gary Bain seems to know that he could not have been Alexandria's father. Perhaps his relationship with JoAnn did not begin until JoAnn was already pregnant with Alexandria or until she had already given birth.
So, if Mr. X is not the father of Kyliyah, and if Kyliyah and Alexandria had the same father, and if Gary Bain is not the father of Alexandria, that leads us to conclude that both girls had a different father.
Now, that father could be Adam Mayes. Then again, it could also be somebody else, possibly somebody whose name has never come up in this case.