  I propose a possible explanation to a recently observed ``cross-talk'' effect
in metal-insulator-metal trilayers, indicating a sharp peak near a
superconducting transition in one of the metal films. Coulomb interactions are
excluded as a dominant coupling mechanism, and an alternative is suggested,
based on the local fluctuating electric field induced by mobile vortices in the
superconducting layer. This scenario is compatible with the magnitude of the
peak signal and its shape; most importantly, it addresses the {\it
non-reciprocity} of the effect in exchanging the roles of the films.
