Glad you added that "outside of school" because I can think of 2 times I've seen them in the same place and being respectful towards each other, once at the library and another time at the college's cafeteria.
Well, it would be hard to avoid any contact in a professional environment without resigning your job, so yeah, but knowing people around here, i mentioned that because the first thing said will be they sit at the same table in the cafetaria....
Funny enough everybody will say a school cafetaria doesn't serve alcohol and it's not a very likely place to start sexual intercourse (atleast not during rushtime) if i had said Bella avoids any contact with the Burke's for just that reason to begin with...
But yeah, Bella avoids any social events where alcohol is served and Burke's (mostly Stephen) is present. Jade avoids any outside of school events where Bella is present.... (that's why she goes to the Preps (if you stood her up) instead of going to Cathy (because she is with Bella)...