Supermind by Laurence M. Janifer

Lou didn't wake up until the plane was dropping toward the Washington airfield, and when she did awaken it was as if she had merely come out of an especially deep sleep. Malone was standing over her, which was far from a coincidence; he had been waiting and watching virtually every minute since takeoff.

During his brief periods of rest, Her Majesty had taken over, and she was now peacefully asleep at the back of the plane, looking a little more careworn, but just as regal as ever. She looked to Malone as if she had weathered a small revolution against her rule, but had managed to persuade the populace (by passing out cookies to the children, probably) that all was, in the last analysis, for the best in this best of all possible worlds. She looked, he thought, absolutely wonderful.