So often on this forum I notice that if a poster says their DP/DH is disabled some posters assume they are carers who must be exhausted and that it is okay for the poster to behave in a way that most people would not accept from their own partners. It's as if they think being disabled makes you some kind of second-class citizen.
Just because someone is disabled it doesn't mean their partner is their carer. Many disabled people can look after themselves and if somebody doesn't say they are carer then maybe that is because they are not. In fact, even if they say they are a carer on this forum it doesn't mean they are or that their partner is dependent on them. Nobody has to stay with partner if they don't want to but if they do they are not a saint who require our understanding and sympathy whatever their actions.