I was thinking more along the lines of the shocked cat being the boyfriend, but he didn't fuck the other cat good enough... so she got back at him by making him watch as she got nailed by the doggy dick.
Fucking love dubstep. This is my favourite tune... make sure the bass on your speakers is way up.
http://www.youtube.com/watch?v=_lmKBN7yX_I
edit: this too
http://www.youtube.com/watch?v=jAJ6Vr2G7nI