If it is spilled, then one thing she must not do is use a vacuum, mop, or broom. Heat from the vacuum’s motor will increase the amount of mercury vapor in the air. Mops and brooms will spread the mercury, making proper cleanup more difficult and costly. The vacuum cleaner, mop or broom will become contaminated and require disposal as hazardous waste.
She needs to call a professional to clean it up. Its vapors are highly toxic and can cause sickness or death if too much is inhaled. The best thing she can do is a call a professional and have them deal with it.