Denise Richards was stunned and embarrassed when a private letter she sent to Child Protective Services officials regarding the welfare of her ex-husband Charlie Sheen's sons went public. The former Bond girl relinquished responsibility of four-year-old twins Max and Bob earlier this month (Nov13) after urging Los Angeles CPS bosses to consider having the boys evaluated for behavioural issues. In a letter to a leading official, she detailed what horrors the twins could be, taunting and attacking her daughters and her pets and playing with their faeces. But she never intended the letter to go viral and was horrified when was picked up by media outlets. She tells U.S. news show Entertainment Tonight, "I was sick about it... I was angry... Then I stopped and had to think, 'Oh my God, what did I write in that?' It was a very personal thing. I was embarrassed... I thought, 'Maybe I should have done it differently.' "It wasn't, like, a court document, it wasn't a declaration, I purposely went that way to write something personal as a mom and all of that. I was very upset that something like that would become public." Richards took on responsibility of Max and Bob and welcomed them into her home when their mother, Brooke Mueller, checked into rehab following a drugs raid on her home earlier this year (13). The boys' uncle - Mueller's brother - has been given custody of them and he has moved in to his sister's former home to care for them as she tries to regain custody.