That brings us to the idea of Déjà being "her." After Toby's mom tells her that she "looks just like her father" (she mistakenly assumes it's Randall), all hell breaks loose. She grabs Jack's old baseball bat and smashes the windows of Randall's beloved Mercedes Benz, which he reminds us earlier in the episode that he paid for in cash. Beth explains to her cousin that she's been acting out ever since her mother Shauna gave up all her parental rights in court, and Déjà must be going through so much internally.
We've never seen this side to the quiet and subdued Déjà, but we also really don't know what she's been through and what burdens she holds onto emotionally. The fact that Toby's mom telling her she looks "like her father" triggered her to erupt on the family that has only been kind to her so violently brings up all the possible questions about her past.
Could this violent side of Déjà land her in jail? Is that where Tess and Randall aren't ready to go? Just like Beth, however, this scenario could be too obvious for Fogelman to get away with.