  We summarize our work on a consistency condition for inflation in two-field
cosmological models, in the regime of rapid turn and third-order slow roll. To
ensure a sustained inflationary period of this type, one needs to satisfy a
certain relation between the scalar potential and the scalar field-space
metric. We explain the derivation of this condition. Furthermore, we argue
that, generically, the rapid-turn phase tends to be short-lived.
