SALT LAKE CITY — A Utah woman charged with a crime after her stepchildren saw her topless in her own home is fighting the case that could force her to register as a sex offender, citing a court ruling that overturned a topless ban in Colorado. Attorneys for Tilli Buchanan argue that the law is unfair because it treats men and women differently for baring their chests. They are asking a judge to overturn her misdemeanor lewdness charges and declare that part of the law unconstitutional. Prosecutors counter that nudity is commonly understood to include women’s breasts in American society...