Hello everyone! I'm sorry for bothering you, but could I get some help?

If you remember in my last post, my artwork has been trending on tumblr, but brought to my attention that someone turned my piece "Mommy's Little Girl" into B&W and put their own watermark on it. My signature is still in the corner of the mirror.

WARNING: The tumblr is called "lesbians f*cking". I haven't looked through it but just incase I hope no one runs into anything nasty.
[link]

I don't have a tumblr, nor do I know that much about it, but if someone knows how to report them or something that would be nice. What really bothers me is that a piece that I've put so much work and feeling into was stolen and put up on this inappropriate blog, but those are the consequences of putting my artwork online.

I hope everyone is having a wonderful day!