By that definition, the Supreme Court Justices could never have any conversations, meetings or attend any Presidential functions EVER. You see, during each session of the Court there can be as many as a dozen cases (or more) pending on the Court's docket that would feature President as either the Planfiff or the Defendant.
If Orly gets another Obama case before SCOTUS will Roberts recuse himself from her case? I doubt it. But it will be up to Roberts to determine if he’s been compromised by Taitz. We may see....