Maddam Sir S01 E09 Haseena Gets a Clue

Haseena is stunned to meet Sameer as her date, the same person who was involved in the car accident case with Parvati. While having a chat with him, Haseena finds out that Sameer is a mamas boy. Later, indirectly she gets a clue related to the case, which helps her in solving it. Parvati gets justice. What was the clue that helped Haseena solve the case?