Read the given information carefully and answer the related questions: M is…

Concept

In a blood-relation puzzle, fix gender first using directional clues ("father-in-law" = male, "mother-in-law" = female), then build the family tree generation by generation. A person who marries someone's child is that someone's son-in-law (if male) or daughter-in-law (if female). Each married pair is taken as one man and one woman.

Application

1. O is the "father-in-law of T", so O is male; M is spouse of O, so M is female. M and O are the parents of R.

2. "N is the only son of R who has no sibling" tells us R has no brother or sister, so R is the only child of M and O.

3. O is the father-in-law of T, meaning T married a child of O. Since R is O's only child, T is married to R. So R and T are a couple.

4. T has two children. As N is the only son of R, the second child of R and T is a daughter.

5. T is the mother-in-law of P, so P married one of T's children (i.e., a child of R).

6. V is married to P. Since P married a child of T and V is the one married to P, V is that child of R. V is not the son N, so V is R's daughter; therefore P is male.

7. P is a male who married R's daughter, so P is the son-in-law of R.

Cross-check

Walking up from V: V is a daughter of R, and P is V's husband. A daughter's husband is a son-in-law, which matches T (V's mother) being P's mother-in-law. Both relationships are consistent, confirming P is the son-in-law of R.