Do yourself a favor and retain counsel. Your 30 day notice is likely insufficient to terminate your roommate's tenancy, whether she be a licensee or invitee. You're probably going to have to start over, better to let an attorney look at what you have done and either continue or fix it accordingly.
Best of luck!
You need to provide more information. Was there a Will? How do your names appear in title? Is there any income generated by the house, and if so, do you share in that? Do you share the expenses?
Until it is signed by both parties, you had no agreement. You had, at best (putting aside an argument of "mistake"), an offer that was not accepted. Landlord has the right to change the offer as long as you had not both agreed on the original. You signing the first with knowledge of the second will not work.
You say "started" the 30 day notice, so I am not sure if that means you met with him or if you had actually retained him - however, if you already discussed the details of this case with the attorney (specifically that tenant) he cannot now represent that tenant and he has a clear conflict of interest. Good luck.
Aside from Mr. Levine's correct response, note that the "publishing" requirement would not be satisfied by such a statement, even if otherwise "defamatory," by providing it in one's separation agreement, which is not a public document, nor is it intended anyone else would see it.