A man and his wife were celebrating together  50 years ! 
Their three kids, all very successful, agreed to a Sunday dinner intheir honour.

'Happy Anniversary Mom and Dad,' gushed son number one ... 'Sorry I'mrunning late. I had an emergency at the hospital with a patient, youknow  how it is, and didn't have time to get you a gift.'

'Not to worry,' said the father. 'The important thing isthat we're all  together today.'

Son number two arrived and announced, 'You and Mom look great, Dad. Ijust  flew in from Los Angeles between depositions and didn't have time toshop  for you.'

'It's nothing,' said the father, 'We're glad you were able to come.'

Just then the daughter arrived, hello and happy anniversary! I'm sorry,but my boss is sending me out of town and I was really busy packing so Ididn't have time to get you anything.'

After they had finished dessert, the father said, 'There's somethingyour  mother and I have wanted to tell you for a long time. You see, we werevery poor. Despite this, we were able to send each of you to college.
Throughout the years your mother and I knew that we loved each othervery  much, but we just never found the time to get married.'

The three children gasped and all said, 'You mean we're b******s?'

'Yep,' said the father. 'And cheap ones too.'