Well look at that. His fairytale accepting her place in his life, he couldn't have asked for a better outcome from all this. Let her play the hero when she wanted, she'd get annoyed but find it adorable or something that he had people watching out for her. And why would he not? He'd gotten used to having her with him, she was a balance for when things got messy, when a plan didn't go like he'd planned, when things just got that bit too stressy. Rather than his usual trick of killing things that offended him, maybe he could just be there with his dear fairytale and things would be better.
She was a muse sometimes, much as he knew ever calling her that would bother her.
He knew of course, how much his Final Problem bothered her. She'd love a life with him without the killing, without the control he needed to give himself over his surroundings, over the city and the criminal element within. They all answered to him now and it hadn't even taken him as long as it had in London, of course they were Americans so he supposed that made some sense. But then he'd gone and fallen for one too hadn't he... No though, no she was a Princess, a Princess that had fallen through the seal and then walked into his life. That made more sense to him.
"Of course you're meant to be with me. You're starting to see aren't you? How it all pulls together. Every little strand, every little bit of the puzzle all coming together. I didn't want to have to redo it all darling, not from the start but I had to. Then I found you here, and then it pulled him here and maybe that's how its really supposed to be. ...When he's gone, you'll be my only focus, and you'll continue to live like the Princess you are, wouldn't you like that?" He kissed her back of course, wondering with a slight smile against her lips how Sherlock did without this side of life, there was a thrill to it, and a whole other level of trust. Because she trusted him, much as she sometimes didn't want to. Even still. But he was getting her there.
Oh he'd have to kill her friends. Probably Jo. But that was for later. After Sherlock. When like he'd said, she'd be his entire world.