♠ Axx
♥ Axx
♦ xxx
♣ AKxx
RHO you
4♥ ...??
Players are as follows:-
RHO: erratic bidder and player, with a flair to randomize results. Can open 4♥ on just about anything (weak or strong!).
Pard: pragmatic, but not very reliable player.
LHO: too scared by your expertise to dare double you, even with a trump stack.
You'd like to be able to double for penalties, but you can't
Under these circumstances, do you risk doubling or not?

Help

South opens 4♥.