"So, I hate to make a bunch of demands from the start but can we keep using the Tardis after you drop us off back home, maybe share?" Amy asked
The Doctor smiled. "I'm sorry but I can only make this trip to your time once. Believe it or not but the version of the universe that we just left is where I belong."
"Wait, are you saying we're the alternate universe and that other me with that guy is the right universe?" Amy scoffed.
"It's not exactly a matter of right or wrong versions of reality to travel between different realities is a nasty business. Leaves tears in time and space like the one in Amy's room." The Doctor spoke as he spun around pulling levers on the Tardis' console. "It's the right version for you, just not for me."
"So we'll never get to travel again?" Amy watched as The Doctor shook his head and gave some excuse about how they'll be happy anyway. Of course Amy would be happy with Clara but she didn't want to let go of the Tardis. She looked down at the glass floors of the Tardis and thought to herself of what sort of scheme she could come up with. Something to convince The Doctor to keep them.
Amy and Clara reached their front door and watched as The Doctor waved goodbye. Amy came running back to the The Doctor. "After all we've gone through, you can't just drop us off like we shared a cab." She whispered.
"There's lots of adventures waiting for you right there." The Doctor pointed at Clara.
"What's up?" Clara yelled from the steps.
"So maybe I'm a little scared of being normal." Amy chuckled. "I can't go back to an average life now."
"With her?" The Doctor pointed at Clara. "Your life will be far from average." He disappeared behind the Tardis doors and the Tardis evaporated before their eyes.
Amy ran back to Clara and hugged her tight. Clara could sense Amy's sadness. "I wish we didn't have to say goodbye either." Clara admitted. "But I promise I'll do my best to keep things interesting."
"Oh, I'm sure you will." Amy winked as she walked inside and took her first steps into her next big adventure.