S40·E54 Episode 5861 (Mon 7th Mar 2011)

Jai confronts Charity about her past and she explains that, while she's not proud of her history, Cain's behaviour is just a desperate attempt to split them up and Jai's falling for it. Later, she confronts Cain and tells him that her and Jai have no more secrets, so there's nothing more he can do.