This is just my personal view point. You are just five months into this M and she is pulling this stuff. I see it as a giant crimson red flag! If you were my son, I would plead with you to get out now, while you can. You don't want to have children with a woman like this.

I know you are hurt and embarrassed. Probably wondering what people think, etc. You can't help what others think and besides, it will pass. Sometimes people just show their true colors after they get M. I have know a couple of people this very thing happened. They moved forward and made a new life for themselves. I suggest you do the same.

Take care of yourself. Don't renew a lease or anything else, hoping the M will work out. Get away from her. It is all on her and if she should get her act together in a reasonable amount of time, she will know what to do. Just be thankful you found out before having children with her.

So sorry for your pain.

It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!