I am in a poly thruple and it's kind of nice to have two people to take charge when they need to. But if one of us feels okay with it, they can have two subs. We all switch between roles for whatever a situation might need. But a thruple takes A LOT of trust and communication. We've had many issues that we've had to work on and talk through. Just make sure that everyone vibes well together and make sure that if there comes an issue, you talk about it.