Tuck blinked politely because he didn't know what Will was talking about. Unless Will meant he didn't want a fake marriage certificate. And if that was the case, it was fine, Tuck could live with it. He would worry about being kept apart should either of them end up in hospital, but they could cross that bridge when they came to it.
It didn't sound like that was what Will meant though. "I uhm- We did agree? I like the way things are too. Did I mess up? Did I do something I wasn't supposed to?"