User blog comment:Oknight/Artemis, Cheshire = sisters pretty much confirmed/@comment-70.162.79.73-20110912174350/@comment-4431377-20110913194712

In issue #7 of the comics, it's mentioned that is IS Artemis's father/Sportsmaster's fault for Paula's disability. She states that she took "both" of the falls during their last mission--being sent to prison AND for becoming disabled. So.. I guess that is a pretty legit reason for Cheshire to feel animosity towards SM (if he is her father).