Eru falling for manipulation tactics 101. Remember all, she was praised by the count for being a tactician, and he even saw her as more worthy than the two sons for being able to take over his domain (personality and wits wise).
Looks like it could be Eru’s time, but not everything in this manga is straightforward (though a lot of it is).
Thanks for the translation! And are groups reuploading recent chapters to remind people of the series that have not been taken down?