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.A double cousins

What are two brothers wives to each other?

If woman W married man M who has (biological) brother B, then Bs relationship to W is brother-in-law and Ws relationship to B is sister-in-law. If two brothers are married, their wives are sisters-in-law to each other, even though they may look like they are an extra step removed.More items •16 Jun 2017

Are men married to sisters brothers in law?

Technically, no. You wifes sisters husband is you wifes brother-in-law. We call them our brother-in-law as a term of endearment. In our family everyone is considered our brother or sister without the in-law, as a term of endearment.