It depends on the type of guy the child is into.
your cousin
Family relationships can be ordered as follows: a mom and dad are parents, while their siblings are aunts and uncles. The children of aunts and uncles are cousins. A niece is the daughter of one's sibling, and a nephew is the son of one's sibling.
uncles aunts sholud both spend an equal amout of time together depending on their relationship
Niece is to nephew as sister is to brother.
your niece
You are your niece's aunt, if you are a woman.Any of your sisters who are not your niece's mother are also her aunts.The sisters of your niece's parent who is not your sibling are also her aunts.
Let's approach this systematically. Your mother's and father's parents are your grandparents. Your mother's and father's siblings are your aunts and uncles and their children are your first cousins. The children of your first cousins are your first cousins ONCE REMOVED (thereby establishing both the relationship and generational standing) The siblings of your Grandparents are your great aunts and great uncles. Their children are your parent's first cousins. Therefore your great aunt's niece is your first cousin, once removed, or she may be your mother.
Your fathers brothers are your uncles. You are their nephew, or niece.
Aunts usually address their nieces by name
Your grandfather's sister is your great aunt.
Your parent's sisters are your aunts. You are their niece if you are a girl, or their nephew if you are a boy.
Disowning YOUR uncles is not something that an unrelated person can do. Also while you, as their nephew or niece, can simply decide never to see or communicate with them again, there is no legal means of disowning them, they will still be YOUR uncles.