Relation between Julia and cardinal in 'the duchess of malfi'?

In John Webster's "The Duchess of Malfi," Julia and the Cardinal have a complex relationship marked by both attraction and manipulation. Julia, a widow, is seduced by the Cardinal, who represents the corrupt and power-hungry elements of the church. Their affair is emblematic of the moral decay in the play, as Julia becomes entangled in the Cardinal's schemes while also demonstrating her own agency and desire. Ultimately, their relationship highlights the themes of power, betrayal, and the consequences of unchecked ambition.