What is it called when sisters marry brothers?
A double cousinship occurs only when a set of siblings marries another set of siblings and both have children. This could be two sisters marrying two brothers. In your case, this is a brother and sister marrying a sister and brother. Double cousins actually share the same gene pool as siblings.
What is it called when you marry your family?
10. The most commonly used word would be incest, although technically, incest refers to sex between (close) relatives. However, since a marriage is usually supposed to be consummated (meaning the partners in the marriage do have sex), the word is also applied to marriage.
Can you marry your sister in Alabama?
No, Alabama does not allow legal marriage between siblings. Based on the wording of the law, it would seem that “siblings” applies to both those related by birth/blood and adopted children as well.