[Tier 1] [Animated] Marie Day Butt Expansion

Huge thanks to RavenRavenRaven for providing the initial sketch for this idea! Hope y'all like some juicy butt expansion stuff for Marie Day this year!

Heavily inspired and directly referencing an old Callie Breast Expansion animation by Mike Inel, to the point where the audio matches so well I can assign it to both animations!

Includes a .gif and a .mp4 version, with audio!

As always, the rewards are available in the Discord! Be sure to check there! This is just a teaser!