You are unlikely to find the marriage on Scotland's People (SP) because the marriage indexes only go up to 1932, when she would have been just 16 or 17.
The index at SP tells me that Margaret Hutchison or Yule, aged 79, died in 1994. You can't view a 1994 death certificate online, but you can send away for a copy of it, which will tell you the name of her husband, the date of her death, the date of her birth, her address, cause of death and who registered the death.