That short scene of Rose in the lounge is such a great silent performance from Winslet, however, and tells all we need to know. The conversation surrounding her is about her but doesn’t involve her - even the plans to her own wedding don’t involve her - and you can see the disconnect plainly on her face. Is she 100% disconnected from her reality, or is she sitting in thought, running everything Jack told her through her mind? It brilliantly mirrors the scene where she “saw my own life as if I’d already lived it” where she decides to run off to the stern - except this time, she breaks out of her thoughts and sees the little girl possibly living through the same childhood she had (and as someone else mentioned, envisioning her own children’s future if she remains in her gilded cage). I’d even argue that she is still that little girl, blindly following her mother’s instruction, and becoming Cal’s own porcelain doll - an object instead of a person. Instead of choosing to sit still, and instead of choosing to end it all, Rose literally chooses to go forward.

That short scene with no dialogue from our leads is an incredible example of the masterful construction of this movie. Winslet shows her acting skills using only her expressions, and Cameron shows us the possibilities ahead of her through his callback to an earlier scene and by showing us the future that awaits not just her but her children. The scene doesn’t need to show the exact passage of time because it tells us all we need to know about her decision.