Veteran rocker Keith Richards often played the guitar to entertain his ailing mother in the last days of her life - but his efforts weren't always appreciated, according to the star himself. The Rolling Stone guitarist, 63, lost his mother Doris in April (07), aged 91, after a long battle with cancer. But Richards insists his mother was "acid-tongued" right up until her death. He says, "I sat on the end of her bed two days before she kicked the bucket. I brought round a guitar and sat there and played to her. She's gasping by now, she's out of there, y'know. 'Bye bye mum, see you tomorrow.' "Next morning, she wakes up and tells my secretary, who goes round to see her every day: 'Did you hear Keith play? He was a bit out of tune.' To the end, man. Acid."