Jolie shares six children with Brad - Maddox, 16, Pax, 14, Zahara, 13, Shiloh, 12, and 9-year-old twins Knox and Vivienne.
According to the explosive US report, Angelina has reportedly had a 'tough time' parenting solo since her 2016 breakup from Brad.
An insider claimed, 'Angelina has changed a lot in the last couple of years.
'Brad was always the voice of reason and the one to chill her out when she started getting upset.'
Brad and Angelina's bitter custody battle came to a breaking point on June 12, when leaked court documents showed that the actress was worried she would lose custody if she continued to keep her brood from their dad.
'It is critical each of [the children] have a healthy and strong relationship with their father,' declared a judge, adding that it's 'harmful' to keep children from their father.
According to friends, Angelina's decision to keep Brad away from the kids has begun to catch up to her.
'Friends claim she's secretly seething about the court ordering her to let Brad back in their lives,' a source alleges.
'She doesn't think they should be able to tell her how to raise her kids.'