  We show how to incorporate the lepton sector in a supersymmetric theory of
flavor based on the discrete flavor group $(S_3)^3$. Assuming that all possible
nonrenormalizable operators are generated at the Planck scale, we show that the
transformation properties of the leptons and of the flavor-symmetry breaking
fields are uniquely determined. We then demonstrate that the model has a viable
phenomenology and makes one very striking prediction: the nucleon decays
predominantly to $K l$ where $l$ is a {\em first} generation lepton. We show
that the modes $n \rightarrow K^0 \bar{\nu}_e$, $p\rightarrow K^+ \bar{\nu}_e$,
and $p\rightarrow K^0 e^+$ occur at comparable rates, and could well be
discovered simultaneously at the SuperKamiokande experiment.
