Monopoly bankruptcy question

Has the following situation ever happened to any Dopers in a game of Monopoly?

Let’s say that Joe has a lot of property, but it is all mortgaged, and he is hanging on by a thread. Similarly, Mary has very little cash and has all of her property mortgaged, with the exception of Kentucky Avenue. Joe lands on Kentucky and owes Mary $18. Unfortunately for Joe, he can’t afford the $18 and he goes bankrupt.

By rule, Mary now gets all of Joe’s property. However, the rule states that “If you have mortgaged property you also turn this property over to your creditor but the new owner must at once pay the Bank the amount of interest on the loan, which is 10% of the value of the property.” In other words, Mary owes the bank 10% of the value of each property she inherits from Joe. Mary does not have enough money to pay the 10%, so she also goes bankrupt. In essence, two players go bankrupt at the same time.

My guess would be that the mortgaged properties revert to the bank’s control, either for immediate auction or to wait for someone to land on them. Alternately, you could just ignore that rule, which is probably what most people do.