The daughter of the lead singer of The Mamas And The Papas had a long-term incestuous relationship with her father, she revealed yesterday. Mackenzie Phillips said her father John first raped her when she was 19 – on the night before her wedding. She also recalled how she became pregnant – but had an abortion after not being sure whether the baby belonged to her father or her husband, who had no idea about the secret affair. But as her life began to spiral out of control on drugs, the sex became consensual for almost a decade.

Miss Phillips, now 49, also accused her father of introducing her to heroin when she was still a teenager, missing the vein when he tried to inject her and turning her arm numb. The bombshell family secrets were unveiled in a tell-all memoir, High On Arrival, published yesterday in the United States. But the troubled actress also spoke for the first time last night about her incest ordeal in an interview with talk show queen Oprah Winfrey.