She's been scheming, preparing and setting down chess pieces so that when captain brainfart finally blows his last gasket, she can take him and his family to the cleaners righteously. Trust me, when the attempted engagement dissolvement happens, it will be glorious and spectacular as all the pieces she's placed come into play and she steamrolls the issue through.
I will say that DitW is on to something though. Her plans have to, and do, take into account that they cant provide an excuse for the other side to claim she's the one "cheating". Not that they dont try, thanks to a minor brainfart of our tsundere prince, but Yulias manages to turn that into an advantage AND make a metric ton of money from it.
tl;dr: systematic demolition of captain brainfart and our man-izing indiscriminate flower-head of a heroine is coming, it's just setting up all of the pieces for the best outcome for Yulias.