Denise Richards is taking no chances when it comes to protecting herself and her daughters following Charlie Sheen's "vile" public attack on her, with sources telling me the 'Starship Troopers' beauty has "increased her security" at home.

"Denise and her girls live a simple life," an insider tells me. "She wants Sam and Lola to have normal lives, but after the recent threats and verbal attacks, she has increased her security. When you are dealing with a mad man, it's better to be safe than sorry."