Lupe's from Sega's Sonic SatAm and this screenshot's taken from Valve's Garry's Mod.

The wolf lady was quite interested in any wolves from some fairy tales can inflate themselves silly, so, therefore, she gave it a try and take a very big and very instant breath, causing her belly to bloat up extremely huge in the speed of sound. She seems proud to train herself how to use her new bouncy skill.