Scarlett is growling the whole time (you can sort of hear her), so it's not an entirely peaceful episode, but there wasn't any swatting or hissing - yay!
I've also been meaning to report that Melly's nighttime habits have really settled down recently. She still wakes me up sometimes, but she doesn't scamper across my head or chomp on my chin anymore. Last night, she was snuggled up against my neck, purring loudly, for the whole night. Scarlett spent most of the night on my other side, probably keeping an eye on Melly.
Have a great weekend, all! See you Monday :)