Kim Kardashian is upset that
InTouch decided to print a story claiming that she cheated on her fiance with NFL player Bret Lockett. She's trying to sue the magazine:
TMZ has obtained a demand letter, written by Kim's lawyer, threatening "In Touch" that if it ran the cheating story Kim would take legal action. The letter put "In Touch" on notice ... the cheating allegations "are, at a minimum, damaging, defamatory, and an invasion of ...