You ask a very good, but difficult question to answer. I don't think
there is one answer for all situations of this kind. The people
involved, the history of occurrences, and the family context are all
important considerations. It is normal and healthy for your son to want
to know things about his father. Listening to him and taking your cues
from what he is asking is an important starting point.Children are
extremely perceptive and often are aware of more than we think.I think
it is wise to answer children's questions directly, with some
consideration of their age and cognitive level.It's often useful to ask
them questions back, such as what is it you want to know? What are you
wondering about? The bottom line is that your son deserves to know
things about his father and there is no shame in being truthful.