If you can love a child not your own.
If your eyes well up at someone else's pain.
If you can bless someone without them bowing to you.
If you can celebrate someone's success without demanding credit for it.
If you think of someone while eating their favourite food.
If you can yell and cry at the same time when they are hurt.
If you can let them fly but keep your eyes on the sky.
If you hug till they protest and smile when they don't.
Then you are a mother irrespective of relation, age and gender.