there arre no compassionate grounds with the Parent visas afaik
, since DIAC would consider that as disadvantaging others in the queue ( in fairness they see ALL parents waiting to join their children as having equal compassionate grounds) . There are other parent visas though- depending on whether the family can help with the costs The 143 ( the quicker alternative to the 103 that has the longer wait) costs c. $42k now for instance. And since she has her own home & business, she is not dependent on her children; have a look again at all the Parent Visa options- when she reaches 65 if she hasn't already, there are onshore options. .