It's weird. I have little energy for describing my encounter with him. I found I was acting somewhat narcissistic around him which may or may not have been related to his being more defensive and polite. It's all weird.
His girlfriend was here and she found it appropriate to use us as audience or protection to discuss her issues with him. Bizarre verbal abuse and pathological jealousy stuff. I said in front of him that the only way to counter his irrational behavior might be to stop taking it seriously. He said nothing and grinned in a forced, eery way. I might now be "audience" to him, which is good. He's on his best behavior in front of us.
I find, though, that I have a hard time being in the same room with him. For no particular reason. He's just a presence I feel uncomfortable around. I didn't feel like this before.
When I look at him, there's just one thing I see. Know those cartoons where a starving person sees a roast when looking at anyone or anything? Well, I look at him and I see DNA samples. I see stuff that might help me determine if he is indeed my biological father or not. And not much else.