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Your stepmom is going out to the disco tonight. She wanted your stepdad to help her pick which top she should wear, but he called to say he would be home later than expected. So, she enlists you to help her pick. Each top is more risque than the last, until the final boob-baring top. She likely has it on backwards, but her tits looks so good it in, you convince her that's just the style nowadays. Since she is always concerned with fairness and equality, she wonders what the equivalently daring fashions for men will look like. Crotchless pants perhaps? In the interest of fairness and equality, you decide to show her how well you could pull off that style, which also shows the effect her boob-baring top has had on you.