  We present a supersymmetric extension of the Standard Model in which the new
physics contributions to the anomalous magnetic moment of the muon can be more
than an order of magnitude larger than in the minimal supersymmetric Standard
Model. The extended electroweak symmetry breaking sector of the model can
consistently accommodate Higgs bosons and Higgsinos with $O(1)$ couplings to
muons. We find that sleptons with masses in the multi-TeV range can comfortably
explain the recently confirmed discrepancy in the anomalous magnetic moment of
the muon. We discuss additional phenomenological aspects of the model,
including its effects on tau flavor changing decays.
