I am thinking it has been brewing for awhile but Doctor’s didn’t understand it or catch it for some reason. So it really could have been 6 months but she didn’t find out until the end.
I would be pissed if I was her husband. Something similar happened in my family. My mother knew something was wrong but they didn’t listen and came up with different excuses. Until way too late. Died several months later
I am a big advocate of doing your own bloodwork through www.directlabs.com.