Pa1ul

LHO opened 2D. Passes to me. I bid takeout double with AJ10x spades, AKQJX hearts, AKxx clubs. Partner responded 2 spades. How do I find out if partner has either or both of the two spade honours? If I use Roman keycard, she may give one for A of diamonds, which is useless. We are not experts. In the end I crossed my fingers and bid 6, making.