  We show how topological $G_k/G_k$ models can be embedded into the topological
matter models that are obtained by perturbing the twisted $N=2$ supersymmetric,
hermitian symmetric, coset models. In particular, this leads to an embedding of
the fusion ring of $G$ as a sub-ring of the perturbed, chiral primary ring. The
perturbation of the twisted $N=2$ model that leads to the fusion ring is also
shown to lead to an integrable $N=2$ supersymmetric field theory when the
untwisted $N=2$ superconformal field theory is perturbed by the same operator
and its hermitian conjugate.
