Answer: Hi there! I think your answer would be centration!
Explanation: Centration is the tendency to focus on only one aspect of a situation at one time, especially to an extent that overwhelms a subject or disassociates them from other surrounding stimuli.
In Sarah Lee's situation, she has become so focused on the fact that her dad has more dough than her that she becomes overwhelmed with the situation. Some may say that she's not looking at "the big picture" here, and is unconscious of other facts present, like the fact that cookies will still be made from her dough, no matter its size.