Welcome back to healthcare magic Physician's desk!
YOU HAVE A MUCH OF HOUSE-HOLD ISSUES.
I f your mother in law is not quiting smoking
then her COPD trouble would not subside for obvious cause, may be the old lady wants to quit but is not strong like you to take a firm decision to quit.
Do not get irritated, just be patient and support the lady with her usual treatments, if you get more frustrated then your levels of stress
and anger would increase and will lead to a rift between you and your husband.
You shold mend the things rather than tearing them apart.
You seem to be having anxiety neurosis
Review with your physician for a detailed examinations.
I wish the baby a great health.