Emmerdale’s poshest man, Grayson Sinclair, is set to attack Matthew King this week as he suspects him of once again bedding his wife.

A source tells The Daily Star: “Grayson and Perdy are overjoyed when Katie Sugden agrees to be a surrogate mother for them. They have been desperate for a baby and at first the news seems to bring them closer together.

“But when Katie moves in, Grayson spoils her rotten and Perdy can’t help ­feeling left out.

“And when she becomes distant and moody Grayson suspects he might have pushed his wife back into Matthew’s bed.

“Convinced they are having an affair, he sees red and hunts down Matthew before attacking him and threatening to kill him.”