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