parents really give freedom to both
Your daughter's son is your other daughter's nephew and she is his aunt.
Your mother's son is you or your brother. Your mother's son's daughter is your daughter, or your niece. Your mother's son's daughter's mother is your wife, or your sister-in-law.
No, she does not have a son or a daughter.
Your daughter's son is your grandson and you are his grandparent.
Your daughter's daughter's son is your great grandson, and you are his great grandfather or great grandmother.
Your daughter's daughter is your grand daughter. Your sister's son's daughter's son is your sister's great grandson and your great great nephew. Your granddaughter and your great great nephew are second cousins, once removed ,to each other.
the daughter of your son/daughter
your son
You are the great aunt/uncle of your sister's son's daughter, and your sister's son's daughter is your great niece.
Son, Cary Son, Steve Son, David Daughter, Ashley Daughter, Christie Daughter, unknown
Your daughter is your sister's niece. Your daughter's son is her great nephew.
Your daughter's son is your grandson and you are his grandma or grandpa.