Waiting at a station

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.
The boy insisted again & again but old man denied him again & again.
The boy asked the reason?
The old man said: "If i tell you the time,
then you will ask about me,my name, my job etc.
Then i will ask about you about yourself,
You may get to seat next to me.
Then you may get down off 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 with you too.
Then she may insist to marry you, even may threaten me.
And i am sorry that
I don't want such a poor son in law
who hasn’t got his own watch to see the time."