Maybe I have some serious trust issues but...
People who are a couple and looking for a third person, where ONE is the one taking over with searching for Contenders. So does that mean that person is allowed to talk sexual and act like they’e in a relationship, then shut your phone off and crawl into bed with your Significant Other. Hoping to God they don’t leave you out any discussions. Like, where is the line of Cheating? I mean, you’re really hoping that person in fully honest with you. Otherwise, your ONE Partner could be in multiple relationships.
Communication to all parties is imperative. Don’t rely on someone to relay a message. Make the actual effort to tell them yourselves.
Otherwise, You will wind up heart broken and left wondering what the fuck happened. WHEN it wasn’t your fault., that ONE person was just sneaky and cryptive.
Then remember, you dodged a Relationship full of Mind Games.