Heidi Montag has hired a private investigator because she is convinced her estranged husband Spencer Pratt is cheating on her.
The reality television star has hired a former cop to tail Spencer, who has retaliated by claiming she is cheating on him with one of his friends.
Heidi has shacked up with Spencer's oddly-named friend Cougar Zank, who she claims is nothing more than a friend.
The pair are living in Malibu where Heidi will soon begin filming a new reality television show on life as a single and the breakdown of her marriage.
Friends and family call the split between the two a sham and allegations of cheating just another lie to draw viewers to Montag's new show.
Photo: Getty/Getty Images Entertainment/David Becker
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