I use treelayout with two relation types. (as in your familyTree).
Here, this is the image of what i obtain :
In fact, the relation “orange” is not visible by default, then it is complicated for user to understand that the node “criteres” is placed because of the orange link.
Rather than I would like that “criteres” still placed as a child of “title4”, and the orange relation is then longer. Is it possible ?