Backward N:M relation in one portal
I would like to display in one portal also backward relations as well as forward relations.
Consider a file with every record having data of one person, and a second file with connection-records registering this person knows different persons in a certain type of relation (parent, child, married) in a layout with a portal showing persons B,C,D who that person A knows.
Go to a different record (person D). The portal shows no reverse connection D to A.
Is there logic that the connection-record A to D also generates display reverse connection D to A, this showing in the same portal?