Opponents (EW) are playing Acol (but have a curious aversion to doubling 1NT overcalls).
We (NS) have an agreement that partner signals attitude on the lead of the ace, count on the lead of the king, at the five level or higher (standard signals, high-low to encourage or show an even number).
I led ♥K to see how many tricks we could cash. I know that playing the queen under the ace or king normally shows the jack, unless it's a singleton (or the jack's in dummy), but does this apply in a situation where we're probably just trying to cash our tricks? I won't give the full deal, as I just want to know in principle if you think South should play the queen here.