Heres an idea, for like a whole week do everything you can do to make your mom in a good mood, do all the chores she usually does, make dinner, take her out to dinner, say nice things bla bla bla, bla bla bla.

Stick it out like a champ for a week atleast and she will be in a good mood for awhile. Sometimes parents get stressed out, some call it midlife crisis.

If that dont work, think about buying a gun - and using it.