Since reading the press release for the season 10 finale, I've had this rattling around in my head. What if Sheldon used the summer to test his commitment to Amy? A what if scenario. According to the TR for 10.24, Sheldon flies to NJ to propose to Amy. In this story, "The Kiss" at the door is the cliffhanger. Sheldon never left for NJ. It should go without saying that this is obviously AU.

What causes a man to cheat on the woman he claims to love? Is he just a selfish, self-absorbed jerk? Is he looking to have his cake and eat it too? For Sheldon Cooper, the decision to cheat on his long-time girlfriend, Amy Farrah Fowler, wasn't hastily made. He thought about it, and the potential consequences of his actions, long and hard before making that metaphorical leap into arms of another woman. He sees it as an experiment designed to test the strength of his commitment to Amy prior to putting the long-awaited for engagement ring on her finger. He knows he's taking a big risk- if Amy ever found out about his infidelity, it would devastate her and certainly signal the end of his relationship. He needs to know for certain though that Amy is the only woman for him.

Sheldon has to be sneaky; if his friends catch onto this, he knows they will immediately tell Amy and it will be the end of life as he knows it. He told Amy he is spending the weekend working and requested he not be disturbed. She looked upset when he made the request but she agreed and with a softly whispered, "I love you," logged off for the night. Looking through the peephole of the apartment he shares with Amy, he sees that the coast is clear. Sheldon pulls on his brown jacket and exits, stopping just long enough to lock his apartment door before quickly making his way down the four flights of stairs and to the agreed upon meeting spot, the McDonald's located ten blocks away.

As he reaches the parking lot, he sees a car going through the drive through that is the same make and model as Bernadette's car. Quickly ducking behind some trees, Sheldon peeks out, sighing in relief when he realizes that the plate number is different from Bernadette's. He walks over to Ramona's car and quickly slides into the passenger seat before leaning over and greeting her with a soft kiss.

Her kiss tastes of salty greasy french fries, not like Amy's kisses which often leave the taste of her vanilla chamomile tea upon his lips. Sheldon doesn't like it. He realizes he has one more clause to add to the Infidelity Agreement before it is finalized later tonight. After buckling his seatbelt, Sheldon removes the SIM card from his cell phone and places it in the protective case- thereby making himself untrackable for the weekend. He's already logged out of all of his social media accounts prior to leaving his apartment. They drive for an hour until arriving at their hotel and checking in under the aliases of Benjamin Braddock and Alexandra Forrest. They enter the room through a side door and take the stairs rather than the elevator.

Entering the room, Sheldon turns on a single lamp which sits on the small round table in the corner and pulls out a manila envelope of papers from his duffel bag. He flips to page four and writes, "breath mints must be consumed prior to kissing", at the bottom of the page before initialing it to signify that he made the change.

"Please read the document while I shower as agreed upon," Sheldon requests.

"Or... we could shower together," Ramona suggests, wrapping her arms around Sheldon's narrow waist.

"I... I think I would like that," Sheldon whispers in response as he returns the embrace.

"Your heart is racing. Are you alright?" Ramona questions.

"Ye... yes. I... I'm alright," Sheldon stutters.

"I know how to help my baby relax," she whispers before dropping to her knees in front of him and drawing down the fly of his khaki pants.

With a flick of her wrist, she releases the fly and his pants pool around his legs. His red silk boxers are next as they hit the floor and Sheldon steps out of them. His body is screaming yes!, his brain and his heart, however, are screaming No! Danger! Run!

All coherent thought stops when Ramona takes his erection fully into her mouth, giving him his first experience at fellatio. He blindly grasps for anything to keep himself standing as his knees buckle and he loudly moans.

"Do you like that?" Ramona questions with a devilish grin before swirling her tongue around the tip. "I'll do anything you ask. Things you've only dreamed of. Things she would never do," she promises before taking all of him into her mouth once again.

"That feels good" Sheldon whispers, closing his eyes and running his fingers through Ramona's hair as she hollows her cheeks and quickly bobs her head.

This is wrong. Wrong and dirty and oh my god does it feel amazing. Amy and I agreed that this is one of the two lines we will never cross but if I can practice cunnilingus I can transfer what I learn into pleasing...

"Amy..." Sheldon calls out as he rapidly approaches climax, before hissing as Ramona uses her teeth to scratch him.

"Stop thinking about her," She demands. "I will punish you every time you say her name, every time you think about her. Do you understand?"

"Yes," Sheldon whispers in apology as Ramona stands up and tosses his boxers at him, hitting him in the face.