Your husband's step-daughter could be your daughter.
Your husband could also have a step-daughter who is the daughter of a previous wife from her prior marriage to someone else. In that case, his step-daughter is not related to you, unless you adopt her.
your step niece,,, if it was your brothers own daughter it would be your niece, since its his stepdaughter, than its your step niece.
No relation...lol
No. The sister is a relation, and her husband is an in-law. The husband's brother is no biological relation either. Therefore, the great granddaughter of the husband's brother is not a relation.
He is of relation as a cousin-in-law.
Your cousin-in-law.
This depends on whether the child's father also allows it.
There is none.
Your husband's grandniece is your grandniece-in-law.
He is technically no relation, as you do not share a common ancestor. He is your husband's first cousin once removed.
You are not related to your cousin's husband. He would simply be "My cousin's husband."
Your daughter's husband is your son-in-law.
Your husband and your aunt are not related to each other.