Brilliant!
What an awesome concept. It's too bad that some people can't see past the fact that this comic features MLP, because that really has very little to do with it. This comic isn't really about ponies. It's twisted, it's psychological, and it's brilliant. If it were any more original, it wouldn't be 'fan art' at all. I love that you've taken a cute cuddly children's cartoon, and turned it into something mature and surprisingly creepy.
I sincerely hope you choose to continue this story.