From the BBC article
"Reiterating the events described in the book, Winn said Moth made an investment in Cooper's property portfolio, and when the investment was due to mature, Cooper said it had failed due to low occupancy.
Winn said Cooper promised to eventually pay the money back, and the couple asked for it to be returned in 2008. Instead, she said, Cooper offered them a loan through his company, assured against their home, with 18% interest, which he said he would cover."
Eh? So they lent someone some money. They asked for it back. But instead they get offered a loan and they assured the loan against their home?
I don't understand that. If you are owed money, then the person who owes you money doesn't loan it to you? They give it to you.
That doesn't make sense