An unspoken agreement is in danger of dissolving. It’s time to put things on paper or formalize them by some other means. This is not a show of mistrust; it’s a necessary act of security. If you want things to succeed, you have to cover your bases and think about potential problems. Your actions directly shape your future, so don’t hand power over to someone else. Even if other people deserve your blind trust, they still have to act in their own best interests.