Socialite-actress Gretchen Barretto denied the accusations of estranged sister Claudine, whose credibility she questioned in light of her supposed mental illness and alleged history of drug abuse. Subscribe to the ABS-CBN News channel! - http://goo.gl/7lR5ep Visit our website at http://www.abs-cbnnews.com Facebook: https://www.facebook.com/abscbnNEWS Twitter: https://twitter.com/abscbnnews For full episodes: http://www.iwantv.com.ph - Philippine viewers http://www.tfc.tv - outside Philippines