My Ex was bipolar. She would spend outrageous amounts of money. For example, she spent $1000 on baby shower gifts using her company credit card. She was almost fired for that I had ended up taking a 401k loan to pay off the card.
She would also not pay the mortgage (her only responsibility, I paid for everything else). I received a call at work one day from the mortgage company saying they were getting ready to foreclose on our house. I had absolutely no idea she had not paid the mortgage in 3 months.
It finally ended when she had an A and moved to another city.
I certainly had issues too. I was controlling due to my lack of trust, this just further drove a wedge between us.
She has since been foreclosed on in the house she bought after our D, been evicted from 2 apartments etc.
I've brought some of that baggage into my current relationship with WAW. I can be controlling with money. I never pay a bill late, always have good credit etc. However, I tend to take it too far and obsess about never letting money create issues for me. I always thought I was setting us up for the future, but failed to realize to sometimes relax with money and do fun things. Definitely something I need to work on and not let control my life so much.