Sorry I can’t contribute to the topic, but you should know that if she has varicose veins instead of just veins close to the skin’s surface, she should get them treated at some point

Not necessarily exactly the same wires, but all rated for 16A, so the circuit beaker will trip long before any wire gets a chance to heat up

source: https://gabrieleseghizzi.com/stories/giorgia-villa-parmigiano-reggiano/