Im so sorry your sister is leaving. It sounds like a scary time. I'm sure you will have challenges in dealing with it but perhaps you can begin to mobilize your resources to help you cope. -- Scheduling time with friends, making time for weekly calls with your sister when she is away if possible., etc. I do not doubt you will have strong feelings about this. It sounds like a big challenge, but you are strong enough to deal with it. You have our support.