AM and PM

There are two kinds of people. The AM's and the PM's. I have defined them differently than the Webster's dictionary. To me AM means another morning and PM means past midnight. I am referring to lifestyle. Two nights ago, I received a text message at 11:20pm. It was from my boss. She was asking how my father was. After 16 years of working for her, she should know that I am an AM person. I get to work by 7:30am while she is still sleeping. She gets up after 10am and her work day does not start until about 1pm. She is up late at night writing books or doing research. I will not say anything to her about the late text because it has never happened before and she was asking about my father's health.