 The extent of their father's abuse was never fully revealed but based on Booth's vague admissions throughout the show and Hank and Marianne's own statements, it was likely that he was also emotionally neglectful of his ex-wife and sons.One of Booth's deepest fears and insecurities is that he would become like his father, which continues to trouble him to this day.It is implied that their mother was also subjected to abuse by their father as she once mentioned to Brennan that she was thrown down a flight of stairs by her ex-husband.