Okay, thank you for the additional information.
I can certainly understand how you would be upset by this and also not comprehend her actions. I dont understand them either, and since she won't explain at all, this does leave you in the dark. It could be that somehow she found out about all of the legal issues, and figured you were in such a financial quandry, that having the condo go into foreclosure would be beneficial?? I'm only guessing here, as to why she would do such a thing. It could also be that she is having trouble with short term memory or forgetting conversations, etc.
All you can do is ask her (again) or maybe a sibling has more info. if she has talked with them. Obviously, you have a right to be hurt and angry with her (if it was intentional) as she should not have promised something as serious as this, and then not follow through. The behavior is odd, and it's also strange that she won't talk to you about it.
After some time has passed meet with her for lunch or something and ask her again what was going on. Please click the green ACCEPT button for this answer, so I'm credited for my help. Thank you. Warm regards,