What did Hester want to reveal to Dimmesdale? Why?

I think that Hester wants to come clean about her previous marriage to Chillingworth.

Although I am not entirely sure, I believe that Hester would like to tell Dimmesdale who Chillingsworth really is: namely, her [former] husband. She no doubt feels a strong love for Dimmesdale at this point. At the same time, she seems to shake off the importance of social and political institutions like the church who Chillingsworth represents.