Stepsister.
She doesn't have any stepfathers
It is the irrational fear of stepfathers.
The plural of stepfather is stepfathers.
stepfathers........lol
Your grand daughter.
Great Grand daughter.
Your sister's daughter is your niece, her granddaughter is your "great niece"... or you could just call her by name.
Your sister's daughter is your niece, her granddaughter is your "great niece"... or you could just call her by name.
daughter...daughter in law.
Your uncle's daughter is your cousin
She is your Great Neice.
You would call your daughter's son by his name ex: Hi Jack.