All I know is that I like women to act like women and men to act like men. Seems to me it keeps things simpler. I tried to get her to clean out the chicken coop the other day and she said “icky”. Icky!
You don’t get to dress and behave as a boy and then turn into a a girl when it suits you. At least that’s what I told her.
If cleaning the chicken coop was necessary for the good of the household, she should do it as a family service. That has nothing to do with whether you feel she’s effectively presenting herself as a sex object.
Why should your personal tastes in women’s dress and deportment necessarily be a guide for your stepdaughter? Woudn’t it be best if you found your wife sexually appealing and her daughter’s appearance a matter of indifference?