User blog comment:Oknight/Artemis, Cheshire = sisters pretty much confirmed/@comment-70.162.79.73-20110912174350/@comment-64.247.101.210-20110912182809

Artemis' mother is in a wheelchair, which may be Sportsmaster's fault. So she may just hate her father. Or maybe Cheshire is only Artemis' half-sister and they have different fathers.