The fate of an Iranian mother of two sentenced to be stoned to death at any time hung in the balance today as a last-minute campaign to save her gathered strength and her lawyer said even he did not know what the outcome will be: Sakineh Mohammadi Ashtiani, 43, who was convicted of adultery in 2006, is “very frightened and very sad” as she sits in a prison cell in Tabriz and worries about the two children she has not seen in four years, said her lawyer: her son and daughter started the crusade to save her.