Pls solve this family problem

Pls solve this problem as stated below:

*Two men met at a bus stop and struck up a conversation.

One of them kept complaining of family problems. Finally the other man 
said: "You think you have family problems? Listen to my situation. A few
years ago I met a young widow with a grown up daughter. We got married
and I got myself a step-daughter. Later, my father married my
step-daughter. That made my step daughter my step-mother. And my fatherbecame my step-son. Also my wife became mother-in-law of her
father-in-law. Much later the daughter of my wife, my step-mother, had a
son. This boy was my half brother because he was my father's son. But he was also the son of my wife's daughter which made him my wife's
grand-son. That made me the grandfather of my half brother. This was
nothing until my wife and I had a son. Now the half sister of my son, my
step-mother, is also his grandmother. This makes my father the 
brother-in-law of my child, whose step-sister is my father's wife. I am my
step-mother's brother-in-law, my wife is her own child's aunt, my son is
my father's nephew and I am my OWN GRAND FATHER!!!!!!!!!! And you think[b] you have FAMILY PROBLEMS*