Lust is Zip of Sins Venials' sister donation incentive comic Drop Dead Gorgeous.
Too much of it fits too well: you have the extreme resemblance of Lust to the host of "You Bet...", you have the purple cloak (and Lust's purple appearance when she's not unlocked), and of course the rockin' bod in both cases.
Rhett will become a Sin
They already offered Anger's position to him in the original Sins story. Eventually, he'll take the place of one so he can live happily ever after with Lust.