If pard had ♠Kx or ♠Kxx we need a switch, and if pard had ♠KQx or ♠KQxx we need a continuation. If pard had ♠KJx we need a continuation unless he has the ♣Q also. If pard has ♠KJ tight we need to play the ♠2 regardless of what the signal means. Given the above I would play low, encouraging.