^^^ thats what I was getting at in a roundabout way
If he took loans in his own name she should stop paying them and tell the bank it will be subject to Family Court action.
If she was a signatory to extra mortgages on the house, which he then frittered away it is a little more complex but I'd be asking the bank about only paying half, or their hardship provisions.
Next, a real fast google of SMSF shows who regulates them. The first result in fact.....
OK I got confused about the kids but it sounds like vent about the ex and a lmgtfy issue

more than a real question.
Now you say its 2 loans that are against the home, but there was 3 a couple of pages ago and you were paying all 3?
Kinda hard for anyone to offer advice ...................... but if one of the 3 was taken by him and not secured against the house I know what I'd be doing there..