The source also says that Jolie's approach has been "super aggressive," and that the 41-year-old actress' strategy is to go public with private matters, while Pitt hopes to remain amicable during this time.
The source adds that during the child custody process, "the different things that needed to happen are happening."
Last week, ET confirmed that Jolie and Pitt's temporary custody deal included voluntary individual counseling. Pitt, 52, also agreed to undergo drug and alcohol testing, though he was not required to, sources told ET.
"She is only concerned with the health and safety of her children, that is how she feels at this moment," a source close to the situation said of Jolie.
A source also told ET that camps for the A-list stars had recently been having "productive discussions." The source noted, "The fact that things have quieted down is a good sign for everyone."