Since both of the characters are looking very nicely at each other, and the story had said that Montresor was only smiling at thinking of his revenge, puts the reader in suspense at what Montresor is going to do .
When Montresor says "Go in; the Amontillado is in there." That makes the reader think of what is actually located and what Montresor is doing. in there.”
When Montresor traps Fortunato, it makes the suspense of what was going to happen next and what else Montresor has in mind to trap Fortunato.
When it turns into one of the final moments, the suspense is added at whether Fortunato had died, and what Montresor had planned to do next. It makes the reader of what could occur and how that would end up affecting the story.
When Montresor says that Fortunato had made fun of his honored name, and he would get revenge, that already builds up suspense into the reader and gives them many ideas at what they are going to do.
When Montresor says that Fortunato was overall a strong man, but had a weakness of wine, it builds up suspense at what was going to happen next and what he was going to do with the wine