These women simply IDENTIFY as mothers.
Probably some men, do, too.
A still smaller sampling identify as platypus.
“A still smaller sampling identify as platypus.”
that made me think, “Hey, what the plural for platypus?”
platypodes: https://en.wiktionary.org/wiki/platypodes
Would the plural be platyplii?
I’ve had women identify themselves as pet parents, showing off pictures of their pets in costume when I showed pictures of my human children in costume.