The male Charizard and the female Typhlosion are from Nintendo's Pokemon and this screenshot's taken from Valve's Garry's Mod.

Looks like Charizard the ladies man is at it again, going on any dates with any fat and huge-bellied female Pokemon, including this Typhlosion, whose father is a Snorlax, which would give her a personality to enjoy eating and getting her stomach big. She seems to enjoy him using Belly Drum to make a fun BOING sounds on her belly. Their date's been so far so good.