Kate Gosselin Kate Gosselin

Jon & Kate Plus 8's Kate Gosselin says she and her husband have been struggling with their marriage for months.

"I don't know that we're in the same place anymore, that we want the same thing," she told People. "I've been struggling with the question of 'Who is this person?' for a while. I remember where I was the first time I heard her name. It's one of those things where you can try to make it go away, but there's blaring, red flashing lights."

The woman she's referring to is 23-year-old school teacher Deanna Hummel, whose brother told Us magazine that she had been having an affair with Jon Gosselin. He has denied any affair, and Hummel said her brother is lying.

Kate Gosselin also said she is "horrified" by a new Us report that says Jon Gosselin was so suspicious of her closeness with a bodyguard that he considered hiring a private investigator. The bodyguard's wife told the magazine that talk of an affair is "ridiculous."

The 33-year-old mother of eight said she is still hopeful for her marriage. "I will never give up hope that every member of our family can be absolutely happy again," she said.