It's important - in situations like this - to remember what you get to decide and what others get to decide.


It's also important to remember that, in this case, your decisions will create a framework for other's decisions. Be wary that you do not force someone into a decision that you do not want.


Decide first what your goals are by first determining what is (most) important to you. Then make decisions that further your goals. If preventing your daughter from 'ruining' her life is the most important thing - by all means, feel free to cut her off. If, however, you find that your relationship with her is the most important thing, then you might want to think twice - such an action may cause her to take a radical course of action - such as moving to a distant state for a job - not to mention a great amount of diswill generated between the two of you.

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How you want to react is your decision.