Wise move. Don't try to read too much into the written text. That rarely (IMO) is all you get. I cannot comment on that hotel as I've never stayed there, but we have regularly had breakfast extended to all members of the travelling group. The booking with "Spouse Stays Free" is now "2nd Guest Stays Free" which may be read to mean a child stays free even though they do anyway, although this has not been my experience. In your case book for 1A + 2C (assuming your party is 2A+2C) and write in the comments field "Spouse Stays Free - Occupancy 1A + 2C". This has always worked for me (remembering though, a lot of rooms can only take 3 people).
Having said all that, I have had at least one hotel (Hilton Taupo), strictly apply the written terms so waiting for check-in is your best move. Expect what you've booked and you won't be disappointed and anything else will be an appreciated bonus! Don't be shy about asking for exec lounge access as a gold member......at worst, they can only say no!