He that takith his sistir `the douytir of his fadir, ether the douyter of his modir, and seeth hir filthe, and sche seeth the schenschip of the brothir, thei han wrouyt an vnleueful thing, bothe schulen be slayn in the siyt of her puple; for thei schewiden togidere her filthe, and thei schulen bere her wickidnesse.