4♣ was forcing in this auction, 5N was a general grand slam try. Passing 6♥ would have shown first round control, so X was merely denying a ♥ void or the ♥ ace.
1. Do you agree with South's auction to this point?
2. Would you push to 7, or sit for the X?

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1♦-(1♠)-2♣-(2♥),
4♣-(4♥)-5♣-(5♥),
5♠-(p)-5N-(6♥),
X-(p)-?