Princess Bubblegum's Phat Experiment

You are summoned to Princess Bubblegum's lab where she reveals her scientific experiment went wrong, dramatically enlarging her backside; after asking if her girlfriend Marceline would like the change and realizing the experiment also made her intensely aroused, she can no longer wait, grinding her phat new ass against you, removing her lab coat to squeeze her bare tits, and finally pulling down her shorts to expose her naked bubblegum rear while asking if you mind.