Winter recognizes the fear that's terrorizing her at that very moment.
The scene playing before her may be different, but the emotions she's feeling are too familiar for her not to distinguish. It's not something that had happened during her current timeline – in fact, all the events that took place ever since she traveled back in time were less extreme than what she experienced before.
Her former timeline was worse, no doubt. That was why she was able to realize that whatever she's feeling right now was similar to what she felt at one point back then.
She is beyond petrified.
"Don't worry. I've got you, Winter. You're fine."
Marcellus spoke up softly, having seen how scared Winter was.