A mother and sister charged in the murder of pregnant Michigan woman Rebecca Park were allegedly sleeping with her fiancé and the biological father of her unborn child, according to People. Citing court documents from the tragic case, People reported that Richard Falor, the man engaged to mom-of-two Park - who was found murdered November 25 in an area of Manistee National Forest in South Branch - was having affairs with her sister, Kimberly Park, and her biological mother, Cortney Bartholomew. Kimberly, 21, Bartholomew, 40, and Falor, 43, have all been charged with Park's murder.