If you mean in the case of one of your parents re-marrying - the children of the new partner are your step-brother/sisters.
In America, yes.
Simply your brother or your sister. My best friend is of a difference ethnicity and family, but she's my sister. Family means someone you love, someone who helps you through thick and thin....by blood or not.
These people are part of your extended family. They are not related by blood to you and there is no simple word for the relationship. They are your husband's sister-in-law and brother-in-law, of course.
Yes, your brother-in-law is your relative by virtue of marrying your sister, of of you having married one of his siblings. But he is your relative by law, not because you have common ancestry. So that relationship can go away - if there is a divorce, for example.
Your sister's sister-in-law is your sister-in-law, but only if your sister's sister-in-law is the wife of your brother.If your sister's sister-in-law is the sister of your sister's husband, then she is not your sister-in-law and is not related to you at all.
Nope! Not by blood! You could even get married if you want to.
Your brother-in-law's sister is not related to you if your brother-in-law is the husband of your sister. If your brother-in-law is the brother of your spouse, your brother-in-law's sister could be your wife, but otherwise would be your sister-in-law.
Unless her boyfriend's related to you (like birth brother, father (ew), cousin, uncle, etc.), then no. Not by blood. lol
You aren't related by blood, however, he would be referred to as Uncle.
The sister's son would be the nephew of her brother.
Quil and Jacob. They are first cusans! Leah and Seth too, they are brother and sister
They can date as long as they are not related by blood.