  A two Higgs doublet model with special Yukawa interactions for the top quark
and a softly broken discrete symmetry in the Higgs potential is proposed. In
this model, the top quark is much heavier than the other quarks and leptons
because it couples to a Higgs doublet with a much larger vacuum expectation
value. The electric dipole moment (EDM) of the electron is evaluated with loop
diagrams of the third generation fermions as well as the charm quark. The
electron EDM is significantly enhanced for a naturally large $\tan\beta \equiv
|v_2|/|v_1|$.
