Is that whole calling-off-the-wedding-just-five-days-beforehand-thing simply water under the bridge now?
While E! News has yet to confirm the initial report by RadarOnline that the magazine mogul and his onetime fiancée are actually shacking up again, evidence does seem to be mounting.
Take some of their tweets, for example.
And Hefner himself, posted, "Getting back together with Crystal Harris shouldn't be a big surprise, since I have a history of remaining close to former girlfriends."
However, the "getting back together" part might only be referring to the fact that Harris came over to dine and nothing more.
"Shera & my other Mansion girlfriends welcomed Crystal here at dinner on Tuesday night, before playing games together," Hefner tweeted.
Of course, regardless of whether or not the two are living under one roof, Hefner's feelings for his former flame apparently continue to burn.
"He loved Crystal more than he had loved any woman in a very long time, that's why he was willing to marry her when there were so many women before her who he couldn't properly commit to," a source told E! News. "She had a hold on him that he has never been able to shake. And so it's of no surprise to me that he would get close to her again. He can't help himself. He has a deep connection to her."
—Reporting by Ken Baker and Sharareh Drury