Since everyone in the town was so casual about Jaskier and Vespula's argument in the middle of town, I want to headcanon that their fighting is like a once-a-week thing.
Every week, like clockwork, Jaskier and Vespula would meet up and seek out something to argue about. However, their contentious encounters were consistently interrupted when either Geralt or Yennefer sought Jaskier's assistance for a pressing matter. Consequently, Jaskier would depart, leaving the duration of his absence undisclosed. Eventually, Jaskier would return, and the cycle would begin anew, with Vespula and him rekindling their connection.
As time went on, the townspeople grew accustomed to this predictable pattern. They had become so used to it that they even found some solace in the knowledge that it often yielded a fresh ballad or melody born out of the cycle's events.



