Why Romus was not Married after Lena's Death

So everyone knows that Crown Prince Romus is going to be future king and after his wife died there is a opportunity for everyone especially for nobles families and very big opportunity for minor nobles and other members in House Toras to advance in further social status by marrying their daughter to Future King of Rizia. and if Romus doesn't want to another noble daughter to for political gain and if he choose to have affairs and one of his mistress was able to have influence on Romus and after Lena died that mistress see that is an opportunity for her to become next queen consort and give Romus a son and next heir to throne. Or a daughter of a minor or powerful noble of kingdom become Romus's Mistress and after Lena died she see that is an opportunity for her to seize by marrying Romus and giving her a son to secure her Position in the kingdom. Last option a movie star or some business owners daughter.

Edit- Everytime I Play DLC This thought come to my mind everytime that in kingdom like Rizia where monarchy still held power why no opportunity for second marriage come or why other family or close persons or person with different plans don't to come talk about second marriage. Only option for marriage come in late game if you decided to Romance with Lucita. I don't know why But there is plenty of opportunity for marriage other than Lucita. I know pabel is Romance option but I'm not gay and I hate there is only Lucita marriage option for straight person because everyone knows how manipulative she is.