The Doctor walked into the Tardis kitchen to find River standing in front of the oven with a tray of freshly-baked chocolate chip cookies. She was taking each cookie and placing them onto a plate that held another batch of cookies already. The whole room smelled wonderful.
He walked up from behind her and put his arms around his wife, taking a cookie and biting into it all the while. He rested his chin on her shoulder as she slapped his hand in a disciplining way.
"Those are not for you!" River said, continuing to place cookies onto the plate.
"Well you wouldn't make cookies for them to be merely looked at, would you?" he replied, swaying back and forth with his arms still around her.
"You mean why would I make two whole batches of warm, delicious, chocolatey, homemade cookies for no reason? Well, I wouldn't, of course," she teased. He was about to ask why he wasn't allowed to eat them when she kept talking. "They're for a friend."
He seemed shocked. He'd always loved his wife's cookies, especially chocolate chip. "And you didn't make extra?"
"I wouldn't do that to you, sweetie. I left you those."
The Doctor looked to where she pointed on the table. There, rested delicately on a new plate, were a few odd shaped cookies. When he went to investigate further, he found that these were the cookies that had gotten messed up in the oven; ones that had been misshaped or even slightly burnt.
"No, no, no," he said, turning back around to face her. "The only thing over here is a plate of cookies that you deemed not good enough to give to someone."
"Exactly. Hence the term "extra". They'll still taste the same."
"Okay, even though that's completely unfair, I'm going to let it go this time. Now, I have some work to attend to," the Doctor teased, walking over to River and kissing her on the cheek gently. Then he grabbed a fresh cookie off of her tray and ran before she could stop him.