One option, if you have the means and can collect the mail from your parents' house, is to go ahead and pay their bills yourself -- it's not illegal to pay someone else's bills.
Pulmonary embolism occurs when a clump of material, most often a blood clot, gets wedged into an artery in your lungs. These blood clots most commonly come from the deep veins of your legs. This condition is known as deep vein thrombosis (DVT). In most cases, multiple clots are involved but not necessarily all at once.
Blood clots can form for a variety of reasons. Pulmonary embolisms are most often caused by deep vein thrombosis, a condition in which blood clots form in veins deep in the body. The blood clots that most often cause pulmonary embolisms begin in the legs or pelvis.