You know, I just thought of something. I think Jim is messing with some people in a way that I haven't seen discussed.
Some fans have had issue with Molly being a romantic intrest because of her father and Harry being good friends and people thinking that it makes it feel like Harry is Molly's uncle.
Now, Jim is marrying Harry and Lara, who are basically step siblings through Thomas.
I don't know if Jim is throwing it in people's faces that this is his story to tell or if it is an unintended thing, but I think it's funny either way because it's what is happening.