Nice job on the "pure smut fantasy"! I definitely see similarities with the two characters from my story (Jen and I) - especially your sadistic 'mommy' and my sadistic Dom. Very nicely written - it allows the reader to get drawn in.
The only thing I would have liked to have seen is a good description of the female lead - sometimes I like the author to describe the characters and sometimes I prefer when I can use my own imagination. With your story, I would have liked more description.
Bottom line, it's definitely a story I would follow - especially for the BDSM aspects (I'm a DL, not an AB)