iMac and MacBook Air shared monitor

I have used a thunderbolt connection and pressed Command F2 to allow my track pad and keyboard on my MBA to run both screens. However, I want to use the wireless track pad and keyboard that comes with the iMac instead of the laptop track/keyboard. In other words, I would like the iMac to be the primary computer and use the laptop as a secondary screen (with all control remaining with the iMac). Is this possible?