Oh my God! I just found out at the age of 40 that I have a 20 year old son. This is mind blowing.
That really is shocking. Do you know how it happened?
Yes, I was drunk for two weeks in Hong Kong and didn't know about it before I left.
You should learn to be more careful when sleeping with people, it's important. What if your son ends up hating you now?
I'm going to tell him I care about him a lot and it's okay.
Telling him you care about him should help the situation, but be prepared to make up for a bunch of lost time. Try to be patient with him, because you don't know how he feels about this.