please

she was caught staring and wanted to change the topic

oh and she was staring at our mc bc she looked like princess vanessa (the one the grandma used to serve)

i am not quite sure either but probably and maybe she felt guilty towards rudiger? since she basically abandoned him when he's just a baby to look for jonas

just a speculation/observation:

She was trembling coz she PROBABLY realized that Judith's eyes is kinda similar to the Princess she served before, and PROBABLY realized that Judith has some royal blood. She PROBABLY used the question whether the Uncle would be back in the army as a diversion to hide her nervousness- OR not lol.

yeah but then again, that's all speculation so she's probably just getting lost in her thoughts (a perhaps a hopeful suspicion) --> trembling from excitement, fear, anticipation or nervousness? no idea.

but it's highly likely she used the qs to divert our mc's attention

That makes sense, like she said the MC's eye colour is rare so I wouldn't be surprised if later we find out that she has some sort of connection to the royal family

Guys, after spending a whole night thinking about this, I thought the answer simply cause the mother too, like every servants in that household, is afraid of our ML cause he’s cold blooded(?)

Apricornlatte is prolly right. The grandma was caught staring our FL too much and she needed to divert the convo but it’s just so happen that the topic she chose has something to do with her son that kinda scares her(?)