What are we supposed to think of the final "justice" in the end of "The Miller's Tale"? Does everyone in the Miller’s Tale get what they deserve and deserve what they get?

I suppose that there is an understated moral to this play; John should not have been such a "cradle robber"! Miller seems to indicate that justice is served Justice when Alisoun commits her own adultery, thus giving her husband a taste of his own medicine.