Thank you all for kind words of endearment. Their deaths came as quite a shock. Baby (pictured on the right above) was acting off - not eating much, not leaving her hidey, and Maya was following suite. I took them both to the vet, where Baby was diagnosed with UTI.. she was prescribed Baytril and syringe fed baby food/critical care. Maya however, was (seemingly) in perfect health. Her nails were clipped and she was on her way.
Baby had always been frail little thing, and I only got one dose of antibiotics in her before she passed in the early morning snuggled up with Maya. Unfortunalty, I think the loss was too much for Maya, the pair had been bonded since birth, and she started pining. I began syringe feeding her as well, but she joined her sister at the rainbow bridge shortly after. My heart is very much broken, you always think there is more time.