Yes it is a tragedy for both families.  Not knowing the details about her, I doubt prison will help.  I would only favor prison if this was like the tenth DUI conviction she received or tenth accident.  She should lose her license and I would require her to work in  clean up crews after accidents.  Maybe if she sees a few bodies splashed on the freeway, she will think twice about drinking and driving. 

I just hope she has decent insurance.