Answer the questions based on the information given below. Eight persons N, O, P, Q, R, S, T, and U belong to a family of three generations. No single person in the family is parent. There are only three married couples in the family. T is the only son of U. N is the father-in-law of S. S is married to T. R is the brother-in-law of S, who does not have any sibling. P is the mother of Q. The gender of Q and O is same as U. O belongs to the third generation. O is not the child of R. How is O related to P?