She looked really miserable and stonefaced the whole time. She may have been sick that day, or, she may be entering that phase of adolescence where she sees her parents as separate from her, and she is so over them; maybe just had an argument with someone that day.
She might be starting to look look at her parents’ dysfunctional relationships in a negative light. All the other older teens and young adults have strongly separated and individuated away from the identity of their parents, rejecting polygamy. On Instagram, Logan even promotes coffee drinking, (almost seems like he has a marketing contract with a coffee shop), and is often shown drinking beer, both forbidden in their faith. Mariah was the only one who was into polygamy as a younger teen, and then after falling out with her mother and getting betrayed, she rejected her mother and radically changed her identity. She does seem to be so much happier now; she is smiling in almost every shot this season.
Notice how all the kids abandoned the game by the end. It seems like everyone was ready to be done, but then there was a producer set-up where they required Meri to give two compliments to each adult. That was cringe-worthy, and the producers knew it would be. She was downright rude to Jenelle in that part. I don’t like the way it was so scripted and manipulated.
Axel was born in May 2017, and in this scene he was crawling (cute baby) so he must be seven or eight months, and it must’ve been filmed around December, or January 2018. That means they got everyone together recently for the game and the boring tell all where nothing at all was “jaw-dropping”.