F.B.
Not the case with us, but J. be aware that there can be several reactions to self improvement by one partner which is not also embraced by the other partner.
1. there can be the good for you encouragement.
2. there can be the hop on the bandwagon joining in the change.
3. there can be the silent encouragement (not necessarily cheering, but not standing in the way).
4. there can be resentful undermining. (people can try desperately to maintain a sometimes disfunctional status quo, because they are afraid of change). fear of what is motivating you to change (i.e. is there someone else?), fear that your success might further highlight their own inadequacies, fear that you will think less of them, or if you find success, will harp on them to join you down your path to change, might cause a partner to try to undermine your success. Be wary of this, build in extra patience, plan for contingencies.
I've known people who have quit smoking without announcing it to friends and family. In par because they were afraid to fail in the effort, also, in part, because they didn't want to be undermined by well intentioned people. "Looks like you are having a rough day, why don't you J. have a smoke, and try quitting tomorrow"
Good luck to you and yours,
F. B.