So after much thought and heart ache, I have decided not to pursue the temporary guardianship. With my dad in full enable mode, it just would not make any sense to do so at this time, plus she's on her New Years Resolution of not drinking, so I think it will be ok for a few weeks.
If we take on the kids I think too much resentment will build up, while we take on the full responsibility of one or two kids and my dad enabling Dez just would not be a good situation. My dad would have to stop enabling her and I don't think he is ready for that now. Babies are ok for now, but I can't live in a "What if" state and be completely stress out all the time.