Tenants divorcing, both want to stay, how to best handle?

[Tracy D.]

We have long term tenants (13+ years) who are getting divorced and both want to stay in our rental.  They are on month to month and have been for quite some time.  We want him to stay (she is difficult and has a history of being untruthful from time to time) but we're not sure exactly how to approach this.  Tell her we are giving her 30 day notice and signing a new lease with just him?  Give them both 30 day notice then rerent to him once she moves out?  She thought she was just going to tell him he had to leave and move in her mom and new boyfriend......but that's not happening.

This will be a high drama situation no doubt and a major headache regardless of what we do, just want to try to make it as quick as possible. Anyone dealt with a similar situation?