Bonnie is demonstrating moral sensitivity as she decided to keep the money and pay off her bills. She consider that the owner of the wallet has no financial problem that she could just keep the money and will not bother to find and return the wallet that she found.
This is an example of moral sensitivity where Bonnie identify which possible action she will make that is to keep the money, where she assume the full responsibility on how they would be affected by the consequence of her action and that is her bills was paid off and the owner of the wallet is financially stable.