To say the least, all three of them had their claws clipped immediately after the incident. Of course, I now have THREE TIMES the number of scratches from the claw clippings!
But maybe I should have just had my feet under the covers while they were playing. Here's how it happened: Tora (not the perpetrator) was laying at my feet (which were totally exposed from under the covers), while her two sisters played. Cinnamon (the perpetrator) decided she wanted to play with Tora and jumped to get on the bed, missed, and grabbed my feet to try to hold herself up. OOOOOOOOOOOOOWWWWWWWWWWWW!!!!!!!