The term "cousin-in-law" is a recent invention and is neither well defined nor widely accepted within the genealogy community.
Presumably, a "cousin-in-law" is your spouse's cousin. The mother of your spouse's first cousin is his or her aunt, but she is not related to you. The mother of your spouse's second cousin is his or her first cousin, once removed.
Your mothers sisters Granddaughter is your second cousin
your grandpa
The relationship to you would be your cousin !
It means she is serious about the relationship
She is your third cousin.
Your mother's son is your brother or your half brother.
2nd Cousin
Your mothers hairy vagina
"Relationship to you" means who are they to you, or how do they fit in to your family circle. be they your paternal aunt,(fathers sister) maternal aunt (mothers sister) maternal grandmother (mothers mother) paternal grandfather (fathers father). and so forth.
Yes, she did. She had the relationship of a mother that a mother has with her son. As most mothers do.
You are their aunt or aunt by marriage.
Do something nice for next mothers day