There are eight members in the family J, K, L, M, N, O, P and Q with the three generations. No single person in the family is a parent. U is the mother of
X. Y is the niece of T. R is the father of
V. W is the sister-in-law of T, who is the father of
X. S has only two married sons. X is the grandson of S. How is Y related to R?