I answered the door and D17 came into the hall and he handed her an envelope, saying that he'd give her more of her money back as soon as he had it (he took the kids' money from their bank accounts several years ago when in a 'cash flow crisis'). The envelope contained $1,000.
He would not stay, saying he had to work.
Luckily, the house was in darkness so I couldn't really see his face at all. I was sitting watching TV and had all the lights switched off to save on electricity (pathetic but that's what I'm reduced to these days).
Much the best option. He was more like an apparition.