No you cannot live without your lungs. Some people are currently living on one lung but you must have at least one lung. The lung is responsible for collecting and distributing the oxygen you need in order to breathe.
Yes, your mom will still be able to live with one lung, i can say so because i only have one, also i was born with no tongs oles, one lung, one kidney and a very, VERY low immune system. This is called Hypogammaglobulineimia, you can even Google it or look it up in the dictionary of you want to.
An unhealthy lung, is a lung that is perfect. It has no problems, and if you have an unhealthy lung, then you will live for about 90 minutes. If you have a healthy lung then you will live until 50 years. Thanks for reading Daniel Murison