My MIL is a lovely kind person, never had an issue in over 15 years knowing her.
She is a bit vulnerable however; struggles to read and write, struggles understanding information and is one-way with conversation/talks at long length without realising; she doesn't take incoming information in unless she really concentrates, but even then she can get things mixed up.
She's quite traditional in that payments/bills were made via cheque or cash, in person. She cannot use a computer. During lockdown she asked me to help so I set up direct debits for all her bills, prescription deliveries and organised a weekly food shop etc. We set up a joint account so I can pay for anything she needs. I keep a paper trail to prove everything is above board.
My DH is unable to help her at all (apart from moral support) so the 'doing' falls to me.
She has had issues with neighbours, property, her car, I've always stepped in to help at her request. From completing her census for her to getting a BT engineer when she had issues to speaking with solicitors on her behalf, she's increasingly relying on me. I feel honoured she trusts me and I care about her so much.
Basically, she's needing more and more support. She has now inherited a big sum of money and a property from a family member (not expected) and now is responsible for the bills which she can't afford on her pension. The situation is overwhelming for her and she doesn't know what to do, and I'm mindful not to tell her what do to, but only to support her.
She has another child, DHs younger sister. She is not close to MIL at all and is very very cold with me and DH, there's no contact really. SIL is not interested with MIL is struggling, and will tell her what to do (not always practical ideas) rather than help. I think she genuinely doesn't understand MILs limits.
DH contacted his sister, feeling it was the right thing to do, to tell her how much MIL is struggling and relying on me to do things for her and could we all meet as a family to chat about how to best support MIL and guide her through.
She responded by insisting I step back 100% as it's not my place to help and I'm interfering, I said of course I don't want to interfere I'm genuinely just supporting MIL.
I've gently explained to MIL I need to step back now and she's incredibly upset, and pleading with me to still help her, I feel so torn I really don't know what the right thing to do is?
Do I step back as SIL wants or continue to help but cause more family tension?