Old man waiting a train

Once an old man was waiting for a train, sitting on a bench.
A young boy came to him and asked the time.
Old man refused to tell the time.
Boy insisted again & again but old man denied again & again.
Boy asked the reason?
Old man said if i tell you the time,
then you will ask about me,my name,job etc.
Then i will ask about you,both of us will be frank.
By chance you may get the seat with me.
Then you may get down at my station.
My daughter will come to receive me.
She will meet you. She is beautiful.
You may fall in love with her,she too.
Then she may insist to marry u, even may threaten me.
And i am sorry that
I dont want such a poor son in law
who hasn't his own watch to see the time.