Pierce,
this are sad news indeed, but diabetes today can be cured. Charlie said it's type I, which means that she has to be treated by insulin. Although this can seem quite a hassle at first, one gets readily accustomed to that routine and life can be normal under every other aspect.
Best wishes,
Andrea
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.