Your mother and her second cousin share a common great grandparent. There is a difference on one generation between the two of you. That would make them a second cousin once removed.
Your cousin. You are that person's second cousin.
I think they are you cousins once removed
The relation of the mother;s sister to daughter is niece-aunts.
He's your 2nd cousin
She would be your 2nd cousin.
your 2nd cousin, or maybe your 2nd cousin once removed.
2nd cousin or 2nd cousin in law.
Your mother's 1st cousin's child is your 2nd cousin.
2nd cousin once removed
2nd Cousin
There is 2 answers your mothers brothers children or your dads sister;"s children
I wouldn't suggest doing that.. That person is family.