My family owns a real estate firm and let me tell you that during the "bubble", there were PLENTY of people buying houses that they couldn't afford. Why do you think there are such tough restrictions now on mortgages and thousands of mortgage brokers went to jail for mortgage fraud. Heck, the FBI opened up a branch in miami JUST to deal with all of the mortgage fraud. A personal friend of mine was making $5/hr as a delivery driver at a restaurant, yes $5/hr + tips and bought a $250k house... his thought process "oh it will keep going up in value, I'll refinance and cash out". Not saying that this was EVERYONE, but to say that banks "forced" people into loans is absurd. If I make $30,000/month and you try to sell me a house for $28,000/month, common sense tells me that I can't afford that home.
Not to stir the pot, as I do feel bad for the OP. At this point, go for a short sale. You do need to get a real estate agent who is familiar with short sales and works with an attorney to facilitate it properly. Some banks DO require you to pay the deficiency.
She can't do a short sale right now because the bank won't agree to it. She needs to listen to her attorney (and pretty much everyone on this thread) and stop paying. That will free up income to pay for her other expenses and force the bank to actually co-operate with her. Bankruptcy (if it comes to that) is not the end of the world. Making yourself sick very well may be.