My dachshund Claire was having problems like this, peeing on my bed and also on the couches. Pretty much what I've done includes, taking her to the vet for tests, covering my bed or any bed she can get on with boxes or something that will keep her off, putting flat boxes on any couches, putting tall pillows into chairs she could get into, keeping doors to certain rooms closed when I'm not watching her, taking her out to potty every couple hours (basically starting housetraining all over again), and keeping her in a crate or confined room when she can't be watched. My vet also gave me some pills, non perscription, they're like an herbal type pill that I give her twice each day. Claire hasn't had an accident on any furniture or my bed in at least two or three months which is great! I know how it feels to lay down in your comfy bed only to put your butt or feet or hand into a pee spot! hehehe Very startling and smelly. lol

I would definately watch her really closely and if you have boxes or gates or something to keep her out of rooms or off the beds then try that. Good luck, I hope you can work something out with her.