Thank you for your comment. I am certainly aware that some MCs are going to have circumstances that make being married to Guillaume more problematic and I have plans to allow those characters to state as much and explore that in the route.
As for the extra romance in Sofia's route, its a bit of a secret, so to avoid spoilers if you would like to message me at email@example.com I will happily tell you more there. ^_^
Many thanks for playing