My sister lives in a different country, she's had visitors recently and has some arrangement that means they now owe her money. She's going to be visiting me in the next few months and asks that her friends cash app me the money and I give her the cash when she visits.
A bit of background to avoid drip feeding. When my sister visited me a few years ago she didn't want to exchange money because of fees so she asked me to cover expenses and used an app to track what she owed me while she was visiting. So, I paid for everything, and she noted what her portion would be. We went out for a few meals, and outings, and I cooked several meals at home, she happily drank my cheap wine and didn't buy any herself. At the end of trip she totted up, to the penny, what she 'owed me' and repaid exactly that amount, nothing extra for the meals I'd cooked, the tips I'd paid, the Lyfts we'd taken, or the wine I'd offered.
She has a well-paid job and takes frequent trips with friends. At the time she visited I was in the middle of a divorce and had just lost my job. I'm now divorced and in a reasonably well-paid job, I'm looking forward to seeing her, but feel a bit side swiped by this request.
Am I Being Unreasonable to refuse to be the middleman in her financial arrangements with her visitors?