You left a message, its in your H's court now, LEAVE it alone until he decides to discuss it..
I'd just tell your S that it might be something your H needs to think through for a bit..because.."he wants to make sure its the right decision FOR THE FAMILY.."..or whatever you can think of to pacify the lil guy..
Then simply wait until he brings it up rather than PUSHING for an answer to satisfy your "test"...If he doesn't bring it up, that should tell you he's not too keen on the idea, you RESPECT it and keep going in the right direction..
