Sheldon's 'Surprise'

Shelly comes home, while Ames is away for work, the gang organize Sheldon a party without them telling Amy anything. When she decides to stop by Penny's she's greeted by Sheldon's "Surprise" and kisses her. Then she punches him hard. Then kiss, punch, kiss… Until it all comes to a resolve Fluff rage, joy, the whole enchilada do your magic.