Fiorella has a fascination with numbers. .
She noticed years ago that her three children were born exactly sixty-nine days apart from each other, and recently realized that there's a pattern to the addresses at which she has lived: 429, 2609, pause, 809, 4607, 11508, 9907, 141. Three numerals, then four; starting over as a married woman with three, then four, then five, then relaxing to four, and three.
There's also the constant 1-10 counting she does in seven languages.
Must be her vampire heritage.