Several times I've been told that people with adopted kids are not mothers.
If you avert your eyes to the "virgin" post. You will see several people telling OP she is not a mother because she adopted her biological sister. WTAF?????
If you ADOPTED someone, you are their PARENT.
Yes, I adopted my sisters. I never knew them as my sisters, They have ALWAYS been my kids, and I have ALWAYS been their mom. Anyone who tells me, my kids, or anyone else otherwise is a douche.