There are seven members, S, T, U, V, W, X and Y, in a family. Five members are in different professions, namely Teacher, Doctor, Nurse, Engineer and Scientist. There are two married couples in the family. S is a Doctor who is married to Y who is a Teacher. W is a Scientist, who is the father-in-law of Y. V and U are the children of S and studying in class 6th and 8th, respectively. X is the mother of T. S is the brother of T, and T is an Engineer. Who is the wife of W?