SHE WAS A BAT!!!
Here's how it went down. It turns out that Splotchy is a feline Dr. Frankenstein. Sweet, demure little Splotchy has a cat/bat monster lab on the rug by the back door. At sunset, he transforms my wicked Maddie Bat into her true form.
Luckily I caught the whole thing on film. Yes, a Pulitzer awaits.