In the science project, Sharon gets teamed up with Connor and is afraid she might prevent him from winning the trophy. Maria is Nina's partner. Sharon thinks cheating might be a good idea.
Sharon and Connor are teamed on a science project/contest that Connor really wants to win. Since science isn't her strongest subject Sharon feels she's dragging Connor down and jeopardizing his chance of victory. So when she accidentally obtains some crucial information that thrusts their team into the lead, she's reluctant to clear up the confusion.