it may be as good to talk to someone who knows something about a failing marriage. We have Marten's parents (which wasn't bad, because it was for a less typical reason, and they're still friends), Claire's parents (which sounds like a really nasty thing), and we have Jim (since it appears to me Jim and his ex have shared custody over Sam, it can't be that bad).
A possibility right now would be Dora saying something like "Honey, I'm not disinclined to the whole marriage thing, but let's not get ahead of us right now." - remember, it was a spur of the moment decision to propose. And this is a reasonable answer to an emotional situation, in emotional matters.