This novella is now available on Amazon (link). As indicated in the prologue [posted here], it continues the story of Watching Her Fun, from a different angle. A zipped file containing Mobi, Epub and RTF versions of the first parts of How I Became a Manwhore and Watching Her Fun is available here. The same text, as a .doc file, is here. Text only, but NSFW, and may open automatically.
Both books are ‘free’ with Kindle Unlimited.