Physcially yes, but it is illegal.
Yes.
you make no sense
yes of course it is! y wouldn't it. they r both humans and if they r able to reproduce then its possible, no matter if they are brother and sister
No. In fact she doesn't have a sister. Only a half brother Named Brandon Lamar
If your sister goes with your brother then it's incest and they would both be your siblings. If a girl is dating your brother and they get married this would make her your sister-in-law.
No, according to the second verse of the rhyme, Jack and Jill were brother and sister so it is unlikely that he got her pregnant.
No.
It is your sister's or brother's son, your adopted sister's or brother's son or your half sister's or brother's son. That would make you an aunt or uncle.
he did have brother and sister he had two sister and he had 1 brother
Your sister-in-law is either the wife of your brother or the sister of your spouse. Your brother-in-law is either the husband of your sister or the brother of your spouse. So your brother-in-law's wife is either your sister or is not related to you. Some people incorrectly refer to a brother-in-law's wife as a sister-in-law.
She has 1 sister, a step-sister, a step-brother, a half-sister and a half-brother
Niece is to nephew as sister is to brother.