The bidding was simple. East opened 2♦, natural, weak; you overcall 3NT and all pass.
West leads a low heart, perhaps fearful of carving up her partner's suit when he preempted at favorable vulnerability and there could be limited entries to dummy. You play low from dummy, East plays the ♥7 and you win with the ♥10 in your hand.
You cash the ♠A as LHO follows small and RHO drops the ♠J. Perhaps impulsively, you bang down the ♠K. LHO plays the ♠8 and RHO discards a diamond.
Now take the South seat and continue.

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All 'x' represent the 7 or lower