Meanwhile, the Duke shows up at the prison disguised as a friar so he can "minister" to the inmates. (Yep, that's pretty odd. Check out our thoughts in "Characters: Duke Vincentio" if you want some insight into this.)
Juliet enters and the Provost tells the Duke/Friar that Juliet is going to have a baby out of wedlock and her baby daddy is sentenced to die tomorrow.
The Duke/Friar asks Juliet if she repents her sin.
The Duke wants to know if the sex was consensual.
Juliet says that her sin was bigger than Claudio's. (Weird. What's up with that?)
The Duke/Friar tells Juliet he's off to see Claudio, who is set to die tomorrow.
Juliet is shocked to hear of Claudio's punishment and says as much.