I think Martin's house might have something to do with the High Life update.
I just had a completely different cutscene after delivering the document. Instead of the normal rants with Patrica over the phone, or expressing his love for you, it was totally different. He came up to me and said something along the lines of, "Hello, hello. You're the talk of streets, my friend. Can I call you that?" then he stopped, and turned to his house. "Look at this place. Isn't it beautiful? I bought it for my friend, a business associate of mine. I bought it for her. For him. For her. I like her a lot." then he took the documents, and then said something like, "Perfect. I'll see you around. Keep this house between us."
Is this new? I've been playing RR for a long time and never had that.