From what you have said realize you shouldn't buy any alcohol and let them borrow a book if they need entertainment. Time for a big pot of ham and pinto beans with rice? Sauted cabbage and onions every day? Oatmeal and bananas for breakfast? I bet they are overweight and all of this would be good for them. Buy the cheapest food possible (cheap is not necessarily unhealthy--young parents don't need to be drinking alot--they have a baby to take care of.) If it's not good enough then they can supplement the supplies with their own money. I bet all the comments above will help with your guilt. I also sometimes do too much for others. I get it.