now this doom seemed just to all save turambar , and they marvelled at the equity of airin whose lord lay slain , and they guessed not at the horror of her life aforetime with that man ; but turambar cast his sword upon the floor and bade them slay him , yet they would not for the words of airin whom they loved , and airin suffered it not for the love of mavwin , hoping yet to join those twain mother and son in happiness , and her doom she had made to satisfy men 's anger and save turin from death .