I feel for you and understand what it's like to have a child who is constantly disrupting the emotional climate in a home?a child who finds a way to make everything about her, even if she has to resort to negative behavior. Left unchecked, this behavior can escalate, encourage younger siblings to follow suit and compound the stress in your marriage.
Although you obviously understand the situation here, you don't know what to do about it, which is why I recommend "outside" help. This behavioral program can be used in the privacy of your home. In it, you will learn how to set boundaries with your daughter, clearly define the limits of acceptable behavior and create an environment in which she can succeed and feel good about herself.
Most parents just don't know how to set the limits and structure the rules so things are fair, yet ensure safety and a climate of respectfulness. It's not your fault if you don't know this, but now, you have a chance to learn.
This behavioral program will put a stop to mouthy talking back behavior and you will learn the simple techniques that will create a greater sense of peace and happiness in your household.
Hope this helps. Please write back and tell us how things go.