Catholic Heart Attack

A man suffered a serious heart attack and had open heart bypass surgery.
He awakened from the surgery to find himself in the care of nuns at a Catholic Hospital .
As he was recovering a nun asked him how he was going to pay for his treatment.
She asked if he had health insurance. He replied in a raspy voice 'No health insurance.'
The nun asked if he had money in the bank.
He replied. 'No money in the bank.'
The nun asked 'Do you have a relative who could help you?'
He said 'I only have a spinster sister who is a nun.'
The nun became agitated
and announced loudly 'Nuns are not spinsters!?
Nuns are married to God.'
The patient replied 'Send the bill to my brother-in-law'.