An Interesting Deal with the Wife

♠AQ8xx ♥AKxxx ♦Qx ♣A :Opener
♠J9xx ♥Qxxxx ♦Ax ♣xx :Responder

1♠-P-2♠ started our sequence. Because of agreements with my wife, Leah, I cuebid 3♣ next, and she cue'd 3♦ (Ace or King and possibly a hedge). I cue'd 3♥, and she made a fine raise to 4♥. At this point, I have to admit that I made an idiot bid of 6♠. Obviously, I should bid 6♥. Judgment was just, as the spade hook failed (2-2 split), and the diamond King was well-placed. 6♥ makes, using spades to ditch her losing diamond.

I thought about the auction that I would have if she was up on all the "weird stuff you and your friends play." Assuming a 2♠ raise:

1♠-P-2♠-P-
3♥-P-3NT (super-accept of hearts)-P-
4♣(agrees hearts, asking)-P-4♥(two covers)-P-
???

I don't think I'd see the power of this hand yet. I need a cover in diamonds, and she will have the Ace of anything for this sequence. If the King is placed right, it seems fairly good odds that I can ditch her diamond losers on the spades, and I might even make seven if the spades cooperate. If she has two internal covers, however, a diamond lead will be fatal to the slam. I seem to have several options. I could blast and pray (good living?).

One option is 4♠, RKCB for spades in this sequence, but that leaves me scratching my head. I might make slam opposite the diamond Ace and heart Queen, but not opposite the spade King and heart Queen. Bad option.

Better is 4NT, RKCB for hearts. If she has the diamond Ace, I am happy. Interesting...