Malin, having dealt with the Lich, ultimately did not face any strong criticism. Perhaps Lady Manli decided to abandon her pursuit upon seeing her husband's lack of interest in delving deeper into the matter.
This made Malin somewhat cautious, and he couldn't help but feel a need for a certain level of wariness towards Nobles—a creature one has to be on guard against. Lady Manli clearly aimed to tarnish Malin's reputation—if not kill him. Yet, mere rumors were not enough; Malin even had ways to get the Archbishop of the Church of Justice to speak for him—with Malin's standing at the Church, the elder would surely be willing to do so.
But Lady Manli had given up, which made Malin respect... no, fear her all the more.
Someone so good at judging the situation would likely not act just to sully someone's name. If that were her intent, she could have targeted any of these girls related to Malin.