Explanation:

- Q is married to P.

- R is the mother of P, making her Q's mother-in-law.

- I is the aunt of P, meaning I is P's parent's sister.

- A is the father of I and is married to M.

- M has two children, which are I and another sibling (R, based on family tree logic).

- L is a sibling of P, implying L is R’s child.

- X has two children and no siblings, indicating X could be either P or L.

- Therefore, A and M are the parents of R and I.

Considering all these relationships, M is I's mother.

- Option 1: Father (Incorrect)

- Option 2: Mother ()

- Option 3: Father-in-law (Incorrect)

- Option 4: Sister (Incorrect)

- Option 5: None of these (Incorrect)