I can understand your psycological adversion to such an idea after those premises .... of course our case was rather different.
The idea of caroline being rented or lent to somebody grew very slowly in our common fantasies and was realized after many years of very profound relation. The thing happened a limited number of times and with very carefully chosen people. People that were tested first more than one time as guests and only afterwards got the chance of using caroline without mt presence.
Nevertheless we built some safety check into the matter.