User blog comment:Oknight/TARGET comments/@comment-167456-20110618135439

With Cheshire/Sportsmaster, I get more of the impression that Cheshire and Artemis are half-sisters, both daughters of Paula Brooks, but that Sportsmaster is Artemis' father not Cheshire's. This provides any number of reasons for Cheshire to hate Sportsmaster, like splitting up her parents, or maybe Cheshire even blames Sportsmaster for crippling Paula. Pure speculation, of course. Someone also suggested that Cheshire might be Artemis' aunt (thus Paula's sister), which also works for the same reasons although I think Chesire is younger than that.