How awful, for all of you.
A friend of mine died almost a year ago, in similar unknown circumstances, and was found by her kids. Whilst we weren't particularly close, it shocked me so much, and haunts me still.
from what I can remember, the funeral was about a fortnight later, as PM had to be carried out. But they never found a cause of death.
Subsequently, all 3 of her kids have had various medical tests done on them.