Really the intention of this post isn't to criticize SIL. So hopefully there wouldn't be too many comments about what SIL should do better.
Basically what happened is 26 year old SIL is on an overseas internship. It is unpaid but she got the maximum grant from the organization that is organising it which I assume covers rent and living costs. She converted a small amount of GBP to shekel when she arrived. She was going to use weswap but that did not work out. The money just left her account and basically did not go through; if you look at trustpilot, you would find many users with the same problem, some even had to escalate the matter to the financial ombudsman to get their money back. So SIL was in a foreign country with hardly any money..my MIL was going to do an international bank transfer to my other SIL's israeli bank account (who lives in Israel permanently with her husband) which undoubtedly would incur high fees. So I suggested a more economical method- my DH had a revolut account so it's cheaper for us to transfer money to an Israeli bank account and then SIL (the one on the internship) can pay us back using her UK bank account (instant between 2 UK bank accounts). I genuinely thought this would be an one off until she sorted a permanent solution that did not involve the bank accounts of siblings so she wouldn't have to live on £2 a day (which was apparently all the money she had with her when she landed).
This was what we did. We transferred the equivalent of £660 to the Israeli bank account and she paid us back quite promptly. We transferred another £490 3 weeks later at her behest, except that she took 2 weeks to repay us (which made DH suspect that we are a credit line not just a currency transfer service) and she asked us multiple times what the amount was. She just messaged DH to ask him to transfer 1600 shekels or £400..
I know I can just tell her to sort out her own money problems but that just seems really harsh because it's not like we want her to go without money just because we find it inconvenient to keep wiring her money. But yet at the same time I feel like I did not sign up to be a credit line/currency transfer service nor did DH's other sister sign up to be an ATM. Maybe she should get her own revolut account and DH has suggested that to her but somehow that hasn't materialized. Are there any other fuss free methods to transfer money?
Also while I know it's probably not fair to her to speculate, there is a thought at the back of my mind that as the months go by, this could be a permanent or at least semi permanent loan. We aren't going to chase her to repay if she doesn't have the money, what can we do? But DH and I never agreed to sponsor her overseas unpaid internship either, DH in particular thinks it's a ridiculous idea and she should get an internship or job in London where she can live with her mum for free...