Ten years later...
Sonata pointed at the various food items in the bakery. "That one...This one...And...that one!"
"Right away, miss!" The baker smiled, and began to put the foods into a brown paper bag.
Sunset Shimmer put her arms on her hips, raising a humored brow and smiling at Sonata. "So you're actually choosing pear jam over apple, huh? Applejack might go back in time and prevent us from marrying if she finds out, y'know..."
"Eeeeeeh..." Sonata spun her hands in a 'wheels are turning motion'. "I'll just tell her I was offered to listen to Pearl Jam and misheard 'em."
"Good luck, sweetie. The only way you'll stop her is if you ask Rarity to tell her to calm down. I swear, they've been together for what, eight years? Already feels like they're an old couple..."
Sonata's eyes widened in contemplation. "So since our 10 year anniversary's passed, does that mean we're dinosaurs?"
"Fossils." Sunset giggled. As they waited for the baker, her gaze lingered outside...
...And that's where she saw the two women holding hands. One with hair like bacon tied into a ponytail, and the other with blue and short hair, holding a taco in the other hand while dressed in a business blouse.
"...Hey, Sonata?" Sunset asked, eyes glued to them before she'd lost the sight in the crowd.
"Yeah?"
"...I got to thinking. Turns out there's universal constants after all."
"Oh yeah? Like what?" Said the siren, too distracted by the food that was being handed over to her.
"..." Sunset chuckled, and shook her head. "Us being together, and you loving tacos."