My daughter is currently on holiday in Fuerteventura, the Canary Islands. I for my sins have been tasked with watering her plants. Imagine my horror when I note that her Lupins are looking very sorry for themselves. Suspecting that I had failed the, one and only, task I had been given I gave the plants a closer look.
Both plants are infested with what I believe are Lupin Aphids (according to Google).
I have treated them with a proprietary bug spray but I suspect they have gotten to great a hold and the damage is done.
Only time will tell if the plants will recover.