i think the reason why gerald called alexandra his "wife" is referring to the future, they were engaged so naturally they would get married
furthermore, if you like go back to the story, prince filipe is not actually a "rapist", the whole thing was instigated by alexandra and was acted out by letizia
letizia had always loved prince felipe, however, he did not love her, so once lucia entered the picture and letizia saw how felipe fall for her, she was blinded by jealousy and sought a potion/medicine (which was kinda hinted to be an aphrodisiac) through mario's(?) merchant guild, but since mario was on lucia's side, eventually they kinda condemned letizia and ultimately her plan to use aphrodisiac on felipe failed
but then, alexandra entered, she gave letizia the aphrodisiac that she sought, in which she mixed it with the tea she gave felipe which resulted in him feeling aroused, and when he pinned her to the ground, she said that it's fine for him to do things to her as she loves him
so from these, you can conclude that what happened was within letizia's calculations, she was completely aware of the consequences of her actions
What I'm about to say will sound like I'm nitpicking but things have to be accurate.
I understand Gerald's reasoning and the reference to the future but 'wife' is a word used for a married woman. Alexandra and Gerald were not married yet at that point. If the author really wants Gerald to use the word "wife", I think calling Alexandra his "future wife" would have been better.
About Philipe, I never called him a rapist. The one I referred to as a rapist is Letizia. I know that it was Alexandra's plan and Letizia was part of the plan. Letizia is the rapist because she drugged Philipe. If Philipe wasn't drugged, he wouldn't have participated in the sexual intercourse with her.

I like revenge. This story was okay. However, it doesn't make sense that prince Gerald called Alexandra his wife on the day of the confrontation(?) It would make more sense if he called her his fiancee. Also, so many changes in 24 hours isn't really realistic. I don't think people respond that fast. I would say if Alexandra did all that in a week, then the time frame wouldn't have bothered me so much. Lastly, why make prince Philipe happily married to his rapist(?)
Yeah, a few things don't make sense.
I liked how Alexandra took revenge though ( ̄∇ ̄")