Is your spouse really mentally unstable? Really? Questions to ask yourself are:
Was my spouse always mentally unstable or has my perception of my spouse been altered since I got threatened with divorce papers?
Is your spouse generally a “good” person, but has made some mistakes?
What if your child were mentally ill? What would you do with your child? Would you abandon your child? Your spouse should come before your child if you ever intended to have a lasting relationship.
Have you been scoping the Internet trying to determine whether your spouse is bipolar, clinically depressed? It is possible of course, but perhaps they are tired of being run down, controlled, or whatever it is for so long that they forgot who they are. It happens to the best of us. Sometimes nothing, but prayer and fasting will help if they are really gone.
Has your spouse hit a mid-life crisis perhaps?
Has your spouse actually been evaluated for any of these medical conditions, or is it kind of like reading a horoscope, surprise it matches, - your spouse is bipolar!