Maybe you don't like the bidding, but it's not ridiculous. Anyway, you're in 4♥.
Lead is the ♠8. You duck in dummy and righty wins the J, cashes the ♠A, lefty following, and plays a third spade (let's say a middlish spot).
What's your plan, and does it change whether I tell you the opponents are weak or strong?
(no particular surprise: if you pitch on this trick, lefty will ruff with a low ♥ and play a club).