Directions : There are ten members P, Q, R, S, T, U, V, W, X and Y in the family, there are three generations of the family. There is equal male and female. P is son-in-law of Y. Q sister X have only one brother P. Q and W are the married couple. Q is the mother-in-law of R, who is sister of T. V is the mother of Q. W is son-in-law of V. S is the only son of U, who is daughter-in-law of V.
If Z is mother-in-law of P. then how is S related to Z?