Two men met at a bus stop and struck up a conversation. One of them kept complainingof family problems. Finally, the other man said: You think you have family problems? Listen to my own situation!
A few years ago, I met a young widow with a grown up daughter and we got married.
Later my father married my step daughter. That made my stepdaughter my stepmotherand my father became my stepson. Also, mywife became the mother-in-law of her father-in-law.
Then the daughter of my wife, my stepmother, 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 grandson. That made me the grandfather ofmy half-brother.
This was nothing until my wife and I had a son. Now the half-sister of my son, my stepmother, is also the grandmother!
That makes my father the brother-in-law of my child,whose step sister is my father’s wife. I’m my stepmother’s brother-in-law, my wife is the Aunty of her own child, my son is my father’s nephew and I am my ownGrandfather!

Source: http://edificationinfo.com/family-problem/

Wow some complex stuff

na song be dis o oga, I'm my own grandpa by Willie Nelson