-40 Degrees

Fuck. You can't believe it, she got it right. How did she know that, she was doing so poorly on science....

"Mr. John, was I right? Is -40 degrees the correct answer?" Sofia asked.

A dejected you replied that it was indeed the correct answer. Sofia now had the biggest smile you've seen all day. Apprehensive, you ask her what she wants as a reward.

"Aw don't be so sad John, I'll make the reward small as promised. All I want is just a handjob hehe" Sofia giggled. She seemed to be much more excited and move much faster now that she was to claim her prize.