Jon & Kate Plus 8 star Jon Gosselin is accusing his ex-wife, Kate Gosselin of abuse, and claims that his children are suffering from PTSD.

In an explosive interview with Daily Mail, Jon claims that Kate is a 'militant' mother who has abused some of her children for years while putting on a Mary Poppins-like front for the cameras.

"Kate is not doing the shows for her family; Kate is doing it for herself. She's narcissistic and selfish. That's it. Period. All of this is for her - Kate Plus Eight, Kate Plus Date, it's her name first," he told the news outlet.

"She always speaks for the children. They say this; they want to do this - unicorns, rainbows and look, flying pigs. It's all lies. They all have voices."

Jon also alleged that he had to rescue their son Collin - who now has PTSD because of the alleged abuse - after the boy's older roommate at Fairmount Behavioral Health Institute in Philadelphia, smuggled out a heartbreaking letter his son penned in crayon begging for help. 

Jon claims he received a letter from the Pennsylvania Department of Human Services (DHS), stating that they received a report of suspected child abuse regarding Collin. She also allegedly mentally abused and alienated one of their daughters.

Click here for the full interview.