When it comes to updating her site, it really depends on how much content you have in total. You can rotate the Updates since most rebills are 2-3 month average. If you rotate for six months it will look new to everyone who is still a Member and the time to do it is now when you re-launch.
I would also offer a one-time only price since you are unsure of how the site will do and how people might react to the lack of updates (see above).
But mostly I would shift YOUR focus and instead of thinking of this site like how it was years ago, instead view it as a stepping stone so you can re-invest the profits into new sites. A kickstarter for your Porn Life 2.0 if you will.
Hit me up anytime for tips and tricks. I have a few solo girl sites that no longer update and still make consistent sales.