Ok, so it's been a while since I've updated this. My other half has been up and down since then, but has recently managed to get a referral to counselling on the nhs. This is a big step, as she always said counselling wouldn't help her (she's very stubborn). So anyway, this seems to have been helping her, although she's only had a couple of sessions. Her manager and her line manager have also been supportive now they know what's going on.
This was until Monday, anyway. Something went off at work on Monday and she phoned me in tears after she'd been blamed for not doing something she doesn't have access to anyway and so could never do. Basically, her manager can't delegate properly (or at all). The upshot of this is she went to the doctor's on Monday night for something else and this came up which resulted in her being signed off for a week.
The issue is, she has no motivation whatsoever when I'm not around, and I work an hour away from home. She has lots of things she wants to do around home, but no motivation to do them. Can you guys suggest anything that might help?