One of the risks there is that she pays the increased rent, makes your life even more miserable, and you start the 60 days all over again.
Another risk is that she doesn't pay at all, you serve her a "pay or quit" notice and then have to evict her through the courts anyway.
Here's a guide from the CA Dept of Consumer Affairs:
http://www.dca.ca.gov/publications/l...victions.shtml

