Candy,
I would think that there will be therapists there who aren't associated with your sister on much more than a working level. With that in mind, it shouldn't interfere?
Yes, with that in mind, it would still bother me.
I would use someone else as an emergency contact. A friend, or another relative should suffice with that? Yep, if it were me, that's what I would do; list a friend or another relative (even one out of state, explaining that you just recently moved there and why).
What do you think?
KD