The bizarre sensations of travel between worlds eased off, and Sunrise found herself back in Twilight's library, the unearthly, extradimensional light fading away as she gratefully dropped once again to four hooves.
“Hey, Twilight, we're ho—ooof!”
Wherever she'd been, whatever she'd been doing, Twilight had apparently been close enough to sense the mirror's activation. The flying alicorn tackle hug momentarily knocked the wind out of Sunrise's lungs, but she immediately returned Twilight's tearful, fierce embrace. Without thinking, she kissed Twilight's cheek, the base of her horn, and then simply squeezed her, desperately wanting to feel the absolute realness of Twilight again.
It was only a second later when Luna's wings and forelegs embraced them both, but Sunrise and Twilight both shifted at once, bringing Luna into a three-way embrace of joy, love, and relief.
Sunrise loved Luna. Deeply, passionately, unreservedly. She knew that. But without Twilight, even if Luna were there, she also knew that noplace would ever truly have been home again. And it was plain that Luna felt exactly the same.
Whatever this might mean for her, for all of them, Sunrise was completely content to leave it unexamined for now. All that mattered now was that she was where she belonged: in the arms and wings of the two mares she loved the most.
And therefore, finally, home.