It would need those two to be able to link things together.
When Camilo broke into their bedroom and kill them, both Augustine and Isela don’t even know why. Despite there should be some hints like Camilo getting house arrest after bribing the guard to meet with Leticia, implying those two to have a relationship.
But let’s assume here that Augustine doesn’t care about his wife and never pay any attention to her, so he only got fed by rumors and Isela’s words.
Even if they remember, it will be difficult to bring it to trial. Camilo and Leticia hasn’t done anything yet.
Also, Camilo’s father is a duke, head of the dragon knight corps, and the king’s brother. Leticia’s father is a marquis. He might be the first prince, but the fact he’s dating a girl of lower status disregarding his own position will surely hurt his credibility (later his father also asked him if he is aware of his position as crown prince).
Besides, in reality, there’s nothing for anyone to be angry. He can’t say Leticia disrespect him by rejecting the engagement offer, because Camilo claimed she’s taken.
In fact, unlike the previous loop where he ends up marrying Leticia, this time there’s nobody to stand on his way. It’s better isn’t it?