In a certain code language: 'A + B' means 'A is the mother of B'. 'A - B' means 'A is the brother of B'. 'A × B' means 'A is the wife of B'. 'A ÷ B' means 'A is the father of B'. Based on the above, how is P related to S if 'P × Q ÷ R - T × S'?

Pankaj (Male) pointed to a girl and said, 'Her paternal grandfather's only son's wife is my mother.' What is Pankaj's relation to that girl?

A + B means 'A is the wife of B'; A - B means 'B is the daughter of A'; A × B means 'B is the brother of A'; A ÷ B means 'A is the father of B'. If P + R × T - Q + S ÷ U, then how is P related to the mother of U?