Responses
Yeah, but the reason is MC wants to stay on the emperor's good side since his favorite daughter is Rosie. If she does scold Rosie...... Rosie's can later on go and cry to the emperor then everything MC has done so far will be in vain. As she will lose his favor and the high society or nobles would no longer want to be associated/work/support MC.
MC let rosie do as she likes and didn't retaliate or even warn her...getting walked over like this is really annoying (╬ ̄皿 ̄)