I'd assume that before he started trying to break into the carriage they were trying to be as "nice" as possible since they understand Ilya's relationship with Rehart, and they probably didn't want to give him an excuse to start any more problems with her. I also assume that when he DID start...
But isn't her current goal just to become head of the Lombardy family? I see no reason why she couldn't be head of the family as well as being a princess. I mean, the Queen is still the head of her family despite being the Queen. (If I remember correctly)
Weird, this manga has an IDENTICAL plot to "Chillin’ in Another World with Level 2 Super Cheat Powers" so far, even with some art panels and dialogue scenes looking pretty similar. I know it's a bunch of overused tropes anyway but it's strange how similar it is.
They've done it for quite a few of the series up on their website. I joined their discord to ask the group members about it and they acknowledged it and didn't care. Awful group.
Not only that, but they uploaded all of Speedcat's original translations on their website in order to try and make more of a profit out of ad revenue. So they sniped AND stole scanlations despite the series very obviously still being ongoing and their quality being awful in comparison.