So I've been trying to interact with my sister (we're identical twins) less and less over the past few months. She causes me huge amounts of stress, so much so that both my therapist and my husband have said I should cut her off completely and have no communication with her at all.

I've posted before about how she's slowly been trying to take over my persona and how hard that has been to deal with. She's also been spreading the news of my BPD diagnosis and my suicide attempt despite my telling her I didn't want her to tell anyone. But even how she conducts herself on Facebook and such stresses me out. I'm kind of embarrassed she's my sister.

I've had very little communication with her for the past month and that has been excellent for me. It confirms the fact that I will do much better without her in my life. The problem though is my mom. I told her my therapist suggested I cut off contact and she freaked out and told me I couldn't do that...and that my sister is still devastated that I moved which is why she copies me (which I know for a fact is a load of BS). I think it's hard for my mom that both her daughters moved away from home. My sister moved from NC to AZ 7 years ago and I moved to Sweden two years ago... So the thought of my not wanting a relationship with my sister anymore I'm sure is hard to swallow. I don't know how to handle it. Everytime I talk to my mom she asks if I've spoken to my sister recently...and if I say no she gets upset and gives me a lecture about how my sister needs me. It stresses me out.

It's almost like I have to choose between the stress my sister causes me by keeping my relationship with her or the stress of my mom trying to keep my relationship with her in tact. I don't know what to do.