The relationship between you and someone who marries your cousin is that of a cousin-in-law. This means that the person who marries your cousin is considered your cousin-in-law, but they are not directly related to you by blood.
The technical term for the person who marries your cousin is "cousin-in-law." This term is used to describe the relationship between the spouse of your cousin and yourself. It signifies the legal and social connection that exists between you and the spouse of your cousin through marriage.
The relationship between you and your cousin's spouse is that of a cousin-in-law.
Your mother's first cousin is always your first cousin, once removed. That is at the core of what first cousins and removed cousins are. That relationship will never change; your mother's first cousin will always be your first cousin, once removed. The term "cousin by marriage" is relatively new and undefined, and for many it really does not mean anything. Some people use the term to refer to someone who has married a cousin. In that sense, if someone marries your "first cousin once removed," that person would be your "first cousin once removed by marriage." It is completely incorrect to claim that someone who marries your first cousin is your "first cousin once removed" simply because of that marriage.
Your cousin's child would be your cousin once removed. So your cousin's stepchild would be your step-cousin once removed.
The relationship between your sister's (or brother's) child and your cousin is the same as the relationship between your child and your cousin. Your child and your first cousin are first cousins, once removed. Your child and your second cousin are second cousins, once removed, and so forth.
Removed means that a relationship bond was broken due to divorce. If you have a cousin (son/daughter of an aunt, uncle, or other cousin) who marries, that spouse of theirs also becomes a cousin (cousin-in-law, cousin via marriage). If they divorce, it becomes your cousin once removed.
That would be your second cousin.
First Cousin, twice removed.
You mother's first cousin is your first cousin, once removed.
The offspring of your first cousin is your first cousin once removed.
If your uncle's cousin is also the cousin of your parents, you are first cousins once removed. If not, there is no relationship as you do not share a common ancestor.
she would be my cousin