Quinn did not know that the main reason why Charlie was punishing Jaime was actually because Jaime wanted to investigate Claire’s BMW.
In her opinion, the reason why Charlie was punishing Jaime was because her beloved Brother Charlie must still be attaching great importance to her deep down in his heart. Therefore, Charlie must be protecting her as though she was his private property, and that was the reason why Charlie was naturally very unwilling to meddle in this matter.
Quinn was originall