So if your here Grandma your sister i dont think would be anything maybe a Great Aunty because your Sister is your Daughters Aunty. I think, sorry if im wrong. I hope i have been helpful.
The Daughter's child is either male or female therefor the answer must be Grand nephew or Grand niece
Your stepson's children are your grandchildren if your stepson came into your family at an early age, is "like a son" to you as an adult, or was adopted by you. Some people like to say step-grandchildren, but either you treat them like your grandchildren or you treat them politely as non-relatives.
If your son's half-brother is not also your son, there is no relationship as you do not share a common ancestor. However some people might call you her step-grandparent.
If your son's half-brother is also your son, then his daughter is your granddaughter and you are her grandparent
Your sister is great aunt to your daughter's child. The child is your sisters great nephew (if a boy) or great niece (if a girl).
Your sister's daughter is your niece.
Step-niece
Betty White has three step-children, two step daughters and a step son.
Betty White has three step-children, two step daughters and a step son.
Betty White has three step-children, two step daughters and a step son.
It's a matter of how strong your relationship was with your step-daughter. It all depends from how you feel about this all. But just answer yourself a question, what will happen with your step-daughters children if you won't look after them.
Your daughters are great aunties if their nieces have kids. Your daughters kids are your grand children.
2nd Cousin
two daughters, Tracy and Lisa; a son, Brad
No,She Doesn't Have Any Children Of Her Own,But She Has Three Step Daughters
If they are not your daughter's children, then they are all step children. They will be called step-grand children. If they have children, those are step-great grand children. If they are your daughter's children, you must know that they are your grand children as they are directly related to you.
George Washington did not have any stepdaughters. He married Martha Dandridge Custis, a widow with two children from her first marriage, but they were his stepchildren, not daughters. Their names were John Parke Custis and Martha Parke Custis.
Your step-son is the child of your spouse and another person, and is of no true genealogical relationship to you. So your step-son's children would also be of no true genealogical relationship to you either. However, they would commonly be called your step-grandchildren and you would be their step-grandfather or step-grandmother.
The sister of your mother-in-law and her children are not related to you.She is your children's aunt and her children are first cousins to your children.