I’m very surprised if her bank made no queries or issued any warnings. Not long ago we made a substantial ‘bridging’ loan to some very old friends, who we knew would repay the money once they were able to. (And they did.)
Dh was pretty much given the 3rd degree by our bank (Barclays) before they made the transfer.
Having said that, I’ve heard of people making ‘scam’ transfers even after being questioned thoroughly by their bank, and even after being told in pretty uncertain terms that they’re almost certainly being scammed.
In one case it was a woman actually taking out a £10k loan to send to her ‘fake lover’ scammer, after she’d already sent him all her savings!