Before Angelina Jolie filed for divorce, Brad Pitt tried to face the problems in his ailing marriage, and entered counseling to try to figure out how to improve the situation. "He was willing to do anything, change any habit, change any lifestyle, to do what had to be done to make this work," a source close to Pitt told a magazine. "And by \'make this work,\' that means doing what has to be done to make even a split one that is amicable and in the best interests of the children." A source told that Pitt is "wrecked" over the impending divorce, and tried to persuade Jolie to slow things down in order to better prepare their children for what was to come. "He was appealing to her to do this quietly not to save the marriage but to consider the well-being of the children and it was ignored," the source said. But a Jolie source told PEOPLE: "Angelina did what she felt she needed to do." Reporters confirmed that the Los Angeles Department of Children and Family Services is investigating Pitt after he allegedly was "verbally abusive" and "physical" toward one of his children aboard the family\'s private plane. A source told a magazine that an argument got out of hand and Pitt did not hurt his child. "He is emphatic that it did not reach the level of physical abuse, that no one was physically harmed," the source said. "He did not hit his child in the face in any way. He did not do that; he is emphatic about that. He put his hands on him, yes, because the confrontation was spiraling out of control." A source close to the situation also told PEOPLE that the child involved in the argument was Pitt and Jolie\'s eldest, 15-year-old son Maddox. Pitt "takes the matter very seriously and says he did not commit any abuse of his children," the source said. "It\'s unfortunate that people involved are continuing to present him in the worst possible light." During their marriage, tensions arose between Jolie and Pitt due to their varied outlooks on parenting. A source close to the family told reporters that Pitt has "always been stricter." Discipline especially was a point of contention for the two: "They always had disagreements when it came to disciplining the kids," the source said. "He has wanted the kids to have more structure. Brad will get frustrated sometimes and yell at the kids." While Pitt advocated for rules, "Angelina would plea, or not make the kids follow though." This year, Pitt and Jolie spent "more time apart," but the divorce is still a "complete shock," a source close to the couple told reporters. Pitt had been spending more time at the couple\'s home in France, Chateau Miraval, and one source told reporters Jolie hasn\'t been seen there since early 2015. When it comes to how the two will proceed in regards to their six children, Maddox, 15, Pax, 12, Zahara, 11, Shiloh, 10 and twins Vivienne and Knox, 8, Jolie is asking for physical custody, with Pitt being granted visitation rights. She is seeking joint legal custody, and did not request spousal or child support.