For a laugh, Jon decided to enter his mother into the box and sure enough, once he had entered her name in the box, all of Linda’s details appear, albeit in very small text (in order to fit the screen).
Jon noticed that the app was asking him what he wanted to swap between the two subjects. He tapped on the question and a dropbox appeared giving him a list of options.
On a whim, he decided to select relationships. The app made a little animation and then showed him the result. Linda was now his sister while Zoe was now his mother. The app asked him if he would like to accept the changes and Jon clicked yes.