Thanks for the chapter!
Are mistresses only trained to fight or something? Then again as princesses likely had servants take care of all the chores although did they do anything other than fighting like learning governance of territories or something so can help their master with things other than fighting? Btw, dinner will be the meal that defeats the other meal while both will be served in the event of a tie. Don't worry it'll be at its freshest state and, assuming survive, will definitely help the consumer get stronger.
Hard to tell in English but is the sister older or younger than MC? Either way, hope explains why left him alone for a while for business considering she's suppose to be his guard and should've had a few people in Phantasma able to warn her that their father died and her brother is being targeted.