Samantha Morton has heartbreakingly revealed her sister has passed away at the age of 53, just 18 months after her biological father died. The Odyssey actress, 49, is one of nine siblings and spent most of her childhood in foster homes after her parents separated when she was two. Her biological father was an alcoholic and spent time in prison throughout his life, her mother had a breakdown and her stepfather, who died in 2007, was also an alcoholic who served prison time for attempted murder. The award-winning actress has now announced her sibling died in April and she has been 'dealing with coroners and trauma' ever since. Samantha,…