Did something happen to Emilia?

I have been informed by a LN reader that we have no reason to worry, even if it is uncomfortable to watch.

yes

That doesn’t happen I’ve been told because I asked someone who has read the LN that and they said no

Yeah I thought so which is why I replied telling him it was false

@ajw215799 I mean.. don't get involved with that troll named Sahil.

Yeah I thought so which is why I replied telling him it was false

In the novels Emilia felt threatened by regulus and refused to make any rash moves because she could sense he had some great power.

“Emilia was filled with doubt and resistance, but at the same time, her instincts were telling her not to openly defy this man, that Regulus Corneas possessed great power. A horrifyingly vast amount of power.”

Excerpt From
Re:ZERO -Starting Life in Another World-, Vol. 18

“She watched him disappear down the hall, and when he was finally out of view, her shoulders gradually relaxed at last. Her body had instinctively tensed up, completely on guard against him without her ever realizing it.
His mere presence felt just as menacing as the horde of great rabbits—”

Excerpt From
Re:ZERO -Starting Life in Another World-, Vol. 18

The anime couldn’t convey it well in that short window frame but I think it’ll show more in the coming episodes so people like you can get it.