сноха она только для свекра, а вам она невестка. http://ru.wikipedia.org/wiki/%D0%A3%D0%B5%D1%86#.D0.9A.D1.80.D0.BE.D0.B2.D0.BD.D0.BE.D0.B5_.D1.80.D0.BE.D0.B4.D1.81.D1.82.D0.B2.D0.BE_.D0.BD.D0.B5_.D0.BF.D0.BE_.D0.BF.D1.80.D1.8F.D0.BC.D0.BE.D0.B9_.D0.BB.D0.B8.D0.BD.D0.B8.D0.B8