It's entirely possible. It's the closest I've come so far! A lot of the info. I have on Aletha Ann Boyter (my great-great-grandmother) is conflicting.
I have seen her father listed as John or James Henry (but this latter was at her time of death, and her dead husband's name was actually James Henry).I've seen her listed as being born in both McClelland Co, TX and Falls Co., TX, but know she died in Grayson Co., TX.
I'm pretty sure she was born 3/20/1858, thus if this is a match she would have been the younger sister of your ancestor Laura.There was also a rumor of Cherokee blood in the family, but I'm not sure through which side of my great-grandmother.