I actually started this picture a few weeks ago, when I first had the idea for my Half-Animal AU it all started with this song https://www.youtube.com/watch?v=aWPv6drVMIM I randomly came across it and while listening automatically imagined Mikey singing it, with "you" being Donnie, the wolf being Leo and the lion being Raph Raph: I'M A TIGER, NOT A LION, DAMNIT!!
I'll leave anything around this pic to your imagination, it could be tcest, instincts gone bad, teasing big bros or maybe just one of Mikey's dreams, whichever you prefer XD I might draw a Tcest- or Gore-version for how this'll play out if people want me to, just ask in the comments ;)