After sleeping for three weeks with a colleague from work, Dorothy is told by her Prince Charming while in the motel that he's married, and he won't leave his wife because he's scared to do so. Although she initially walks out, Dorothy ends up agreeing to meet him and sleep with him again. Eventually, feeling like she's "the other woman" catches up to her and she breaks things off for good with Mr. Liar/Cheater/Coward.
That's pretty much the entire plot of this episode, and I have a number of problems with it. First of all, Dorothy didn't get righteously furious with Glenn after finding out he'd lied to her for almost a month and led her to believe he was single. What a horrendous discovery, and yet Dorothy, although she marches out of the motel, doesn't let him have it and a few days later agrees to see him again as though nothing happened. Not only that, but didn't Dorothy suspect she was being used as his bimbo (funny as that sounds for angular, scary Dorothy) when she immediately started shacking up with him in a cheap motel and wasn't taken out for dinner nor asked to meet her roommates?
The epsiode really turns me off to Dorothy's character because everything she does here is for the wrong reasons. She continues the affair because Glenn makes her happy (entirely selfish reason) and yet she ends the affair for an equally selfish reason: she doesn't feel respected. Not because it is wrong, not because it's bad for marriage, bad for Glenn's unknowing wife, bad for Glenn whom she allegedly "loves," but because it's bad for Dorothy's self-esteem. Entirely lacking in judgment and integrity on Dorothy's part, and it really sickens me to hear her and Glenn exchanging how much they "love" one another.
As if that were not bad enough, did the writers really expect audiences to believe that a tall, decent-looking guy like Glenn would risk his marriage for some thrill-seeking with...Dorothy? A thirty-something fellow teacher with an equally fit figure would be plausible, but Dorothy as Dreamgirl was stretch on the imagination (pardon the pun).
One more thing: I also didn't care for the fact that Blanche pushed so hard for Dorothy to continue her homewrecking ways - it was out of character, even for Blanche.