The joke I saw before began with a psychiatrist asking a patient, "How did you get here?"

I married a widow. The widow's daughter called me stepfather, and she married my father. I have to call her stepmother, my daughter-in-law became my father's mother-in-law, and my father called me father-in-law. She gave birth to a boy with my father. The boy became my daughter-in-law's brother-in-law. Later, he will call me daughter-in-law and my grandparents. I will call the boy's brother.

~ This means:

~ ~ My stepmother calls me stepfather, my daughter-in-law is my father's mother-in-law, I call my father's son-in-law, my daughter-in-law calls our son-in-law, and I call my son-in-law daughter's son and brother, ~

~ here comes the question ~

: I am my what? ~ What do I call myself?

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I don't know if it's what you want after writing for so long!