Kathy wants equality and Jim promises it to her, but he doesn't use his head at all in applying it. Betty wants to invite a boy for dinner, so Kathy insists that she can, too. No one thought to tell her that equality doesn't imply that she get to invite a boy for the same day. Later, she's wearing Betty's sweater because Betty wore it yesterday. Instead of explaining it to her, they tried to talk her out of it. The whole episode just wasn't thought out very well.