It's my dad's cousin. She's in her 60s, only child, her father (Dad's uncle) died when she was very young and her mother has been gone for many years. Never had any children or a job or any lasting relationships. She has no-one except some cousins who can't stand her.
Dad's memories of her when they were children are of an unpleasant child who was spiteful and always getting others into trouble but who you had to be kind to because she'd lost her dad. Things never improved as she got older, she's just downright nasty I'm afraid (I imagine there must be some deep seated emotional problems if I'm being charitable)
For years my parents (and the other cousins) have been getting nasty letters about how they're her family and they have a duty to take care of her and support her financially. She phoned me once and was absolutely vile about how selfish I was in my comfy life with DH and DC and no care for her. I explained calmly that it works both ways and if you want people to care for you you have to show some care for them - I haven't heard from her since.
She's living in a hostel about 250 miles away. Parents have had a letter saying she's left the hostel and is coming to live with them. Dad is absolutely terrified. It's one thing to tell her she can't come but quite another to turn her (anyone) out on to the street when they're on your doorstep with nowhere to go. What on earth should we do?