Send the bill to my brother-in-law

A man suffered a serious heart attack and had an 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 questions regarding 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, "Then send the bill to my brother-in-law."