An electric car certainly sounds like it'd suit your wife's needs well, assuming she can charge a car at home (i.e. you have access to private parking close to an electricity supply). It'll be easy to drive with very low running costs. The Skoda Citigo-e iV is probably the best value little electric car on sale at the moment (along with the very similar SEAT Mii Electric and Volkswagen e-Up). Your wife's Clio is probably worth very little at the moment, unfortunately, so it might be worth hanging onto it until something goes wrong. That said, replacing it now might give you (and your wife) some peace of mind rather than running an older car until it breaks.