Some things we can all agree on, like the fact that the Pearson family on This Is Us has completely captured our hearts. And though the brood has its own set of special circumstances, we can probably also agree that they're ultimately just like us. Brothers have a sibling rivalry! Parents struggle with bills, and the decision of where to send their kids for school! And as we found out while hanging out with the This Is Us cast recently in Los Angeles, apparently they have squabbles around the holidays, too.

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TVGuide.com talked with star Mandy Moore (who plays matriarch Rebecca) about what big twists lie ahead for the family, and she shared yet another curveball coming in a future episode.

Following the present-day timeline of Rebecca and Randall (Sterling K. Brown) surprised her the most, she said, because it opened up even more emotional avenues. That story requires her to play a woman in her 60s coming to terms with her adopted son's new relationship with the father that abandoned him, and all the new feelings and information that emerge from that. But it isn't all good feelings.

"They're a family and they're going to spend the holidays together," Moore said. "There are some revelations over the holidays that really force a wedge in the middle of this family — and maybe a wedge in their relationship."

Mandy Moore, <em>This Is Us</em>Mandy Moore, This Is Us

While said revelations could include the discovery that Randall's piano playing has somehow gotten worse, it's much more likely that this could be when Randall finally learns that his mother and his birth father William (Ron Cephas Jones) made an agreement that his decision to leave him on the steps of a fire station meant he forfeited his right to be in his son's life.

If that's the case, we'd be talking about a confused, betrayed and furious Randall, a ticked-off Mama Bear Rebecca trying to protect her son and a guilt-ridden William filled with sorrow and regret. All that sounds like the recipe for one very uncomfortable holiday gathering, which might be the most relatable thing we've ever seen them endure.

This Is Us airs Tuesdays at 9/8c on NBC.