Apparently, Scott wanted to bring Sofia along to go trick or treating with the kids, Mason, Penelope and Reign, but Kourtney wasn't having it.
“The week before Halloween, Scott and Kourtney had a epic blowout over Halloween and trick or treating plans with their kids,” a source revealed. “Scott really wanted to be with the kids for the holiday but Kourtney put up a big fuss. Kourtney is resentful that Scott has been lacking in his father duties lately. Instead of spending his free time with the kids, Scott has been traveling with his too young girlfriend Sofia and Kourtney is frustrated.”
“Scott is sad and disappointed because he feels that he is the kids’ father and has a right to be with them during important holidays.
“Scott even wanted to share the fun activity with Sofia and bring her along with the kids, which made Kourtney even more enraged. Since Scott has started seeing Sofia regularly, Kourtney and Scott have been arguing about everything… they have yet to come to a compromise for their Halloween plans with the kids. Kourtney argued that if Scott was going to bring Sofia then maybe Younes [Bendjima] should come too. The holiday could become very scary or interesting for all involved.”
Hopefully the kids still had a good time regardless of their parents arguing so much...