But what about the legal aspects? Shouldn't I get a blood test or something, and do I need to support you in any way financially".
"You haven't changed a bit, always the practical, no-nonsense, rude guy you've always been. Tessa knows you are her father; she is much smarter than you give her credit for. And financially I'm ok, don't worry about us".

Follow up:

"So, what shall we do now? When will we see each other again?"
"Marc, lighten up, you are seeing us now, right? No need to think about what will happen later. We can always stay in touch by phone or mail, and whenever Tessa wants to see you we'll call you".
Marc looked offended. "You know I don't like these automated conversations, I want to be with you,..both.., and not write mails or call each other, it's so sterile".
"Well, you'll have to get used to it. We have our own lives now and I'm not going to change it just because you don't like the way I want to live my life. Come Tessa, let's go."