You are playing for fun with your friends. 4♠ was a bit unwise and now you have to play in this mess.
Opening lead is ♥A! Score.
You ruff and lead a spade towards your hand. King wins. Spade back and they are 2-2 with Ax on your right. RHO thinks for a long time, and plays a heart!
Phew. You're still in the ballgame. Now how do you play the diamonds?
If you run some spade, they both ditch hearts and lefty throws one club.

Help

(P) - 1♦ - (4♥) - 4♠!
(5♥) - 6♠ - (X) - All Pass