She did quit again after we spoke last night.
Winter, I wish you and your family nothing but the best. Please keep in mind that words mean nothing, and only actions count. She needs to show a long and sustained effort at recovery to earn her ??? shot at saving her marriage.
I know that I'm massively projecting my experience with my sister onto yours, so you can take my advice with a grain of salt. I also know that marriage is hard - I'm happily married and it's STILL hard. However, it's good honest work - but it is work that you cannot bear alone.
Just be wary while you're hopeful.