In the Witcher 3 quest, "Ashen Marriage," Geralt assists Triss Merigold and her fiancé, Castello, with their impending nuptials in Novigrad. His tasks include ridding the canals of monsters, procuring alcohol, and selecting a wedding gift for Triss. The gift's significance impacts Triss's response; a memory rose, a nod to The Witcher 2, evokes a powerful emotional reaction, while less sentimental presents are met with less enthusiasm.
However, Dijkstra's revelation that Castello is connected to witch hunters throws a wrench into the proceedings. Castello, it transpires, is being coerced—the hunters are blackmailing him with the secret of his daughter from a previous marriage.
Geralt can choose to reveal this truth to Triss, either privately or with Castello present. Regardless, the wedding is called off. Triss's reaction varies depending on the disclosure method, expressing either disappointment or gratitude for Castello's honesty, but ultimately concluding the marriage was premature.
This unexpected turn could have significantly enriched Geralt and Triss's dynamic, and provided further character development for supporting characters.