In a basic sense, it's not wrong to date a black man when you have a s0n.
However, no two situations are the same. There are quite a few factors that go into the answer to that question.
1. Do you live in a state that tends to be less open to interracial relationships? For a s0n, that could put pressure on him at school and around friends.
2. Is your interest in the man at work sexual, or is there a deeper interest?
3. If you were to get pregnant, how do you think your s0n would react?
4. Does the man at work have any s0n or d@ughter of his own?
5. How would the rest of your family feel about an interracial relationship?
I'm sure you've thought about these things, but I'll paraphrase something that several women I've dated in the past have told me: "If we date, it will be a long time before you meet my *******. I don't want to be introducing men to them every few months if things don't work out."
It seemed wise to me.