I think the issue isn't her sleeping, it's whether or not she's helping you in the house. I have really bad OCD and so rely on my mum a lot (I'm 22), but whenever I come home I try my hardest to help round the house/not make her feel like she's waiting on me just because I'm unwell. It's kind of like a collaboration - she tries to look after me and I try to look after her.
I don't think it's very fair or helpful to tell someone with anxiety to 'just sleep less'. Sleeping a lot/not enough is a key sign that something isn't right - she needs your support right now, not you just telling her to toughen up. Have a conversation with her about the sleeping and tell her you'd really like to help her get into a healthier sleeping pattern, if that's possible. If she agrees, proceed to gently support her in ways which you both agree on. There's no point forcing this, as it won't help her, will only make her feel more isolated and you more frustrated. If she does want help with sleeping, maybe you could plan a nice event together in the morning whenever you're free (weekends?). For example, a walk together, or a class. Something you both want to do. This has the added advantage of you spending time together. The point is, don't try to control her, try to show her that you support and love her. I know that it's painful and stressful - you want her to stop being unwell and get better as soon as possible. But that's something which has to come from inside her. You can't force her to get better or stop being sick, all you can do is support and love her. Things take the time they take.
However, an issue comes if you feel like she is being genuinely disrespectful of you/the home. For example, is she treating the house 'like a hotel', as you say - leaving all the washing up for you, not clearing up her mess, never cooking/helping out with chores? If so, this is a fair point to bring her up on. Even when I was at my worst with OCD (physically unable to eat, crying all the time, really really mentally ill), I still tried to help out around the house because I recognised that even though it wasn't my fault I was sick, it wasn't my mum's fault either. Just because she's sick it doesn't mean she gets to act in a bad way.
The key is that you both view your relationship as one where you love and support one another. It's not 'give' and 'take', it's you both working together to make the household as safe and comfortable as it can be.