Article continues below advertisementSharon Osbourne is confronting grief, frailty and a stark fear her daughter Kelly may be repeating a path she now regrets, friends tell OK!, as the reality TV matriarch issues a private warning shaped by loss and hard experience.Sharon, 73, recently stepped back onto the red carpet in London for the first time since the death of her husband, Ozzy, appearing alongside Kelly, 41, at a showbusiness event.Article continues below advertisementSource: MEGAOzzy Osbourne's death has taken a 'physical toll' on Sharon Osbourne, a source claims.