"Why is it "immoral" or "immodest" for virtuous women to wear pants?

"Why is it "immoral" or "immodest" for virtuous women to wear pants? No skin is shown when wearing pants, so I don't understand the "immodest" aspect. "

"I don't allow you to wear pants and force you to wear skirts, dresses and stockings. This is to emphasise your feminine nature (women are not to wear men's clothing according to the Good Book) and because husbands are charged with setting standards for their wives. You, as a pastor's wife, must meet the highest standards of virtuous Christian ladies with high moral values. And therefore pants in our family only for me and for our future son whom you give birth to me in the next 9 months."