I also was a bit sad that my MC didn't get to know Jasper as her husband b/c of the insurmountable gulf (I'd love for there to be some type of stat check or secret check to where they get to bridge that gap/she finds out via snooping etc. Maybe she won't know all of the secrets but she knows the ones pertaining to her partner)! One of the secret backgrounds may be able to get closer to him though.
Edit: You have to get better ends for every nation to get the better romance ending with Jasper!