OK this has got to be one of the most shameless and twisted instances of a person using her relative’s relationship with a star to make a quick buck.

Kevin Federline’s aunt wrote a book “inspired” by his relationship with Britney Spears.  According to sources the book includes bondage, threesomes, sex toys, and more.

The main characters are Keenan Fazio and Krissy Doucet – he’s a dancer and she’s a…. wait for it….. pop princess!

Oh, and on her website you can enter a contest… guess what the prize is…..

One of Britney & K-Fed’s wedding invitations!!!