No.
If your great uncle married into your family some of his nieces and nephews are your aunts or uncles (or your parent) and some are not related to you at all.
No she doesn't. Have any rights
In most places, only parents have legal rights to be part of their children's lives - and those rights can be restricted or terminated by the courts as part of divorce child welfare proceedings. Aunts, uncles, grandparents, etc generally have no legal standing in that regard.
Yes, as do un c.f. les, cousins, fathers, mothers, sisters, fisters, brothers (except the black kind), nieces, nephews, great and not-so-great grandparents, and people who have no relation at all. Everybody got rights in North Carolina, 'cept black folk
great great (etc.) grandparents great grandparents grandparents + great uncles and great aunts parents + uncles and aunts [=parents' siblings] siblings + cousins [=uncles' and aunts' children] children + nephews and nieces [=siblings' children] grandchildren great gandchildren great great (etc.) grandhildren also cousins and second cousins [=(great-)grandparents' descendants]
great great (etc.) grandparents great grandparents grandparents + great uncles and great aunts parents + uncles and aunts [=parents' siblings] siblings + cousins [=uncles' and aunts' children] children + nephews and nieces [=siblings' children] grandchildren great gandchildren great great (etc.) grandhildren also cousins and second cousins [=(great-)grandparents' descendants]
Muslim men and women who are not closely related are not allowed to touch each other, even to shake hands. Close relatives include parents, children, grandparents, grandchildren, aunts, uncles, great-aunts, great-uncles, nephews, nieces, great-nephews, great-nieces, mothers-, fathers-, sons-, and daughters-in-law. Cousins and brothers- and sisters-in-law are not included in this class, as it is possible for Muslims to marry them.
The possessive form for the plural noun great aunts is great aunts'.Example: My three great aunts' house is a great place to visit.
Your niece's children are your great nieces and great nephews.
Your great nieces or newfews
Families in the Middle East are more traditional (fewer adopted kids, gay spouses, etc.) than Western families, but the members are the same: Mom, Dad, Brother, Sister, Uncles, Aunts, Grandparents, Great Uncles, Great Aunts, Nephew, Nieces, and a billion varieties of cousins.
There are Aunts, great aunts, great-great aunts, et al. A second aunt would be if you have two aunts and you prefer one over the other. But no there isn't.