OP, I’m finding some of these responses quite bizarre. This is a complete stranger who you’ve never met, your parents barely knew and haven’t had any relationship with, she’s pestering someone who doesn’t want to hear from her with numerous voicemails…she just sounds like a nuisance caller!
My father came from a big family, he kept in contact with his siblings but not the wider family, that just happens sometimes and there was no row…his father had about 10 siblings…meaning he likely has quite a few cousins all within a small area…most of which he’s never met, and a couple of them he’s met by chance when out at work and a customer has had the same surname and they just have a friendly chat and that’s the end of it. If any of these complete strangers started phoning me or writing letters, unless I had something to gain from it, I wouldn’t want to engage. The fact that we are distant relatives, on its own, isn’t a reason to get involved.
If she was raised closely with your mother, I could understand her wanting to reconnect with her…but not this persistent hounding of your father, who doesn’t know her, and as well as yourself and your sibling who don’t know her. If this was about wanting to leave money to family instead of elsewhere….and needing some details, she would have given that information already. She’s already going too far with the voicemails, she will get worse the more you engage with her.
She’s bored and lonely and quite likely harmless, but she’s also had a completely different life to yourself and she’s not your problem to fix, you are very busy with a lot of commitments and you likely have nothing in common. She’s also had 50 years to try to make contact with her cousin and build a relationship, it’s her own fault that she’s waited until she is feeling lonely to bother with that, and her own fault that it’s too late to reconnect with your mum due to her ill-health.
Your focus here should be purely on the impact on the family members you have had a lifelong relationship with. She’s distressing your father, who doesn’t even know her, so blocking her number and taking away any letters before he sees them would put a stop to it. If you write to her…and don’t give her a phone number…what will happen? I think it will just ignite her to leave even more voicemails for your father and she will write to you at that address as well…the more you engage the harder it will be to make her stop. If her number is blocked so she can’t leave voicemails and her letters go unanswered…she may then focus her energy elsewhere, hopefully within her own community etc.
I didn’t see the letter before it was deleted, but would be interested if you are able to describe the general gist of the voicemails? Is she asking for anything (other than your contact details), and is she showing any signs of having a life of her own (such as explaining what she’s been doing this week), and is she acting in any way impatient or aggressive at the lack of engagement?
If contacting her at all, I would suggest just politely requesting that she stops writing and phoning your father, you can tell her he has dementia and receiving this communication is confusing for him and can make him feel distressed when he can’t place who the caller is, and he worries about scam callers. Be polite about it and tell her that it isn’t her fault, it’s his illness making it too difficult for him to communicate, and so he can’t engage with her, and wish her all the best. You don’t need to get into any explanation of why you aren’t giving her your own contact details…you’ve never met her, so don’t owe her any explanation of that.
I think if your mother was more well, you could have had a discussion with her about whether she wanted to get involved with her cousin, but as that’s not an option, there’s no-one in the family who has any tangible connection to her, so I wouldn’t get involved. You’ve said you wouldn’t want her will money, even if she wanted to give it to you (that’s if there is anything), so I don’t see what you gain from trying to build a relationship with her. So far all you’ve seen from her is behaviour that is borderline harassing, so she’s likely to do that to you as well of you get involved, there may also be mental health issues causing her to not understand she is cross boundaries with this behaviour. 30 miles also isn’t that far away, if you start communicating she may then start pushing to meet up.
Generally, if you aren’t excited, curious, or hoping for a windfall in the will…why connect with a stranger? She’s causing you stress and you haven’t even made contact yet!
Also with regards to the will. If she hasn’t made one, your mother may be in line to inherit anyway if she dies intestate and your mother is the closest family member. I wouldn’t ignore that completely, it could pay for care fees your parents are requiring. Just worth being aware, becuase although there’s no real reason to feel entitled to a stranger’s money, if its there and it’s useful, then I’d apply for it. What I wouldn’t do however, is get involved in the hope of being left something (which you sensibly are not). Often when people do that they are left disappointed when they find out it was left to their cleaner/neighbour etc.