The actor, who plays hunky plumber Mike Delfino on the show, is convinced crooner Bolton is set for a visit to Wisteria Lane.
He says, "The odds are going up daily, I think. They're inseparable. They are almost the same person... so I'm sure he's gonna be around."
But Desperate Housewives creator MARC CHERRY insists Bolton will have to actually wed Sheridan before he considers writing the singer a part on his show.
Cherry says, "My rules are very set in place - husbands come on, boyfriends have to wait a while."