Problem

The Auction:

You are North on this deal and your partner starts the auction with 1♦, which your respond with 1♠ of course. Your partner then goes to 2♣ indicating 4+ diamonds and 4+ clubs. As you have 14 points and a good seven-card spade suit you mean business and call 2 ♥ – fourth suit forcing to game. Your partner responds with 3♥ and you show your spades for the second time bidding 3♠. Your partner calls 3NT. What should you do, pass or declare 4♠?