A trip to Canterlot for Derpy and Berry is clearly a great way to destress, recharge those batteries before going back to raising their kids. But will Derpy even make it to Canterlot without making a nuisance of her huge boobs and endless lactation?
"Heh. What ... what if I felt limited by linear time?" Derpy started releasing thin arcs of her milk. They'd probably be scattered into individual drops by wind before landing anywhere. "You'd tell me if you remembered me bein' h-huge already when we first met?"
Plot twist: the planet is Derpy's boobs. Always has been.
Plot twist: the planet is Derpy's boobs. Always has been.