I had to cut her off?

I had to cut off my girlfriend she wanted me to take care of her - house , feed her , and buy a car to support her at 45 while I have to take care of me and my 3 kids. She got upset because I told her I couldn't support her.. where the issue is she threatened to go to my family and use a sensitive moment against me..
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She doesn't know where I live persay.. apartment #
I had to cut her off?
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