In the Duchess of Malfi, the reader can see many examples of literary techniques. One example of this is that Webster uses the form of foreshadowing. An interesting example of this is in the scene where Antonio and The Duchess are married. The Duchess calls Antonio into her bedchamber with the intent of marrying him, but at first tells him that she will be dictating to him. The reader soon discovers that The Duchess is going to be dictating to Antonio her will for when she passes away.
It is interesting to recognize the fact that it is a will that the Duchess wants Antonio to write, in some ways this seems rather morbid, when one considers she is about to ask a man to marry her. The fact that it is a will makes the reader realize that in the same hour when Antonio and the Duchess create their bonds of marriage they are also inadvertently point to the end of their love in death. Another interesting point to note is the fact that while the Duchess is talking to Antonio she jokes with him about who will get her inheritance. This also foreshadows (or really just hints to Antonio) about her upcoming proposal of marriage.