Good grief!
I am 63, and have known for a long time that I won't get a state pension until I am 66...it went up from 65 when everyone's pension age went up.
OK, it wasn't that well communicated, but it has been known for long enough.
Also, she should check because if she only has state pension and a tiny bit of workplace / stakeholder pension she won't be able to afford £700 pcm on that, either, I don't think.
It is pretty outrageous, a fit healthy 60 / 61 yo declining to work f/t to pay her bills if she is able. I work f/t, am an occasional carer and get on with hobbies etc. I certainly don't need, and wouldn't expect, a family member to subsidise my choices!
She should also up her hours and work f/t because then she will get more employers contribution into her pension, and more tax contribution.
Obviously most of us would want to help a relative who was in dire straits or an emergency. Expecting others to pick up the bill because she is refusing to compromise the style to which she has become accustomed is outrageous.
I assume her partner had no private pension that named her as a beneficiary?
I also find it pretty outrageous that council tenants are allowed to occupy houses much bigger than they need and then to benefit from renting out rooms, to people who are not on the council waiting list.