Delusional Arrogance
Clayton was well aware of Blair's allergy to lemons. It was a long time ago, but he didn't forget. It was just that his mind was so preoccupied that he didn't notice the issue with the drink.
The misunderstanding left him frustrated and embarrassed.
However, Blair had always been of such temperament, so even after what happened, Clayton still didn't feel that she didn't care about him.
Also, he st