spoilers maybe?

when i was reading the novel someone commented that sienna and kuhn’s marriage was apparently set up by dian so he could watch over sienna?? and that kuhn loved someone else and not sienna which caused them to have an ill-fated relationship. idk if thats true or not but seeing how the future(?) sienna treated kuhn in present sienna’s dreams it was probably along the lines of something like that unfortunatelyi mean it makes sense if you think about it because if it weren’t for the dream sienna had of the balcony/garden by her father’s study she would have never met kuhn until a later stage so they would have most likely been strangers to each other when dian arranged their marriage... but what i dont understand is how kuhn would have even agreed to marry sienna knowing that he didnt love her or had someone else