The 24-year-old also tweeted a picture showing just how she charmed Hefner, her blonde hair thrown back as she struck a sultry pose. Harris met the 84-year-old on Halloween in 2008 and started dating him in January 2009 while he was also dating identical twin glamour models Kristina and Karissa Shannon.
But he ended his relationship with the twins in January this year and has remained monogamous to Crystal since. Previously he tweeted, "She burst into tears. This is the happiest Christmas in memory." And, she tweeted in agreement saying, "The most memorable Christmas ever. I love him."