Playing 2/1, partner is dealer and opens 1♠, and RHO comes in with 2♠ showing ♥+minor. You now bid 3♠ a normal raise and LHO bids 4♥. Partner now bids 4♠ and RHO tanks for about 35 seconds and bids 5♥.
Your bid. Would it differ if it was IMPS?
X would be for penalties and Pass is NF.