Against better judgement I listened to my father and convinced my husband to make her godmother to our son. Things looked better for a while, but now she's gone to far. She threatened to kill our dog and insulted my husband because he was laid off and "it's not her fault he can't keep a job". She's mad because we are moving across the country for my job and a new job for my husband and is acting out by being nasty again.
Since this all went down on Mother's Day I've refused to talk to her. My husband wants me to cut her out of our lives completely, something I'm not willing to do (she's my sister, I don't have to like her) and it's a major bone of contention.
Well now I'm the "evil one"- my mom called the other day and said "sister thinks you're not talking to her". When I said I'm not because she hasn't apologized for insulting my husband and threatening my dog and I'm done with her, my mom got upset and said "I'm not getting involved". Last I checked I didn't ask her to get involved. Why won't my mom understand that fighting over my sister has almost destroyed my marriage and I'm not letting her do that to us? Does anyone have advice? I'm so tired of being held emotionally hostage by this little bitch, who happens to be my sister!!!
ETA- she's currently 20 years old.