My daughter of 7 years dreamed that my mother-in-law had a bookshop. My husband and I where in there as well. She saw an orange small snake and we will all scared of it but then there where an big green snake that swallowed her right leg. When she asked me to help her I answered that I couldn't.

Snakes can mean an injury to business and/or reputation criticized.
Orange means hope
Green in this dream most likely means jealousy

The dream seems to have conflicting meanings of hope and prosperity vs someone wishing harm on ones business and reputation. It may be that the one that dreamed it may see the mother in law as vulnerable. There is some negative feeling in the dream.