In a family, B is the father of K. B has only two children. K is the brother of R. R is the daughter of P. A is the grand-daughter of P. S is the father of A. How is S related to K?

In the following Blood relation diagrams,
Square is represented as Male.
Circle is represented as Female.
Double horizontal line is represented as couple.
Single horizontal line is represented as sibling.
Vertical line is represented as Mother/Father/Son/Daughter.

B is the father of K. K is the brother of R. R is the daughter of P. B has only two children.

A is the grand-daughter of P. S is the father of A.

According to the above arrangement, S is the Brother-in-law of K.