Derpibooru ID number: 1072671
Artist: lvl

Small had never been the right word to describe Luna. She was a princess, a goddess made flesh, standing six-foot-six with the figure to match, and radiant by every definition. She was bigger, she was stronger, she was curvier than anybody in the whole kingdom... save one, of course.

Smaller was the word for Luna, as her big sister’s even bigger form had always eclipsed her own. No gaze could escape the gravitational pull of Celestia’s massive, milky tits, mounted on the body of a seven foot goddess. Past apples, beyond grapefruit, and even straining comparison with melons, no one could look away from Celestia’s hefty udders.

Not even Luna.

“Leaving so soon, sis?” Celestia purred as Luna stepped out of the pool. Her breasts, twin flotation devices that they were, bobbed happily in front of her. A little rubber ducky collided with a palm-filling pink nipple, bouncing easily off the greater object. “Come on, why don’t you stay and have some fun with big sister~”

“We...” Luna’s face burned with a hot blush, her gaze still locked to her sister’s chest. She certainly felt something toward her sister, though whether envy or lust, not even she knew. “We suppose we could swim just a while longer...”

“Mm, that’s the spirit!” Celestia chuckled, her every motion reflected in the ponderous swaying of her bust. Her eyes caught on Luna’s flaming red cheeks, her smile spreading even wider. “Now, since we’re spending more time together, why don’t we celebrate with a big hug?”