In The Witcher 3's "Ashen Marriage" quest, set in Novigrad, Geralt assists Triss Merigold and her fiancé, Castello, with wedding preparations. His tasks include monster extermination in the canals, procuring alcohol, and selecting a wedding gift for Triss.
The gift choice significantly impacts Triss's response. A memory rose, a recurring item from The Witcher 2, evokes a strong emotional reaction, unlike more commonplace presents.
However, Dijkstra's revelation of Castello's connection to witch hunters throws a wrench into the proceedings. Castello is revealed to be under duress, blackmailed by the hunters who threaten to expose his daughter from a previous marriage.
Geralt has the option of revealing this truth to Triss, either privately or with Castello present. Regardless, the wedding is called off; Triss is either disappointed or appreciative of the honesty, but concludes the marriage was premature.
This plot development could have been further explored to deepen Geralt and Triss's relationship and provide more nuanced character development for supporting characters.