Aubrey's disgusting and unacceptable behaviour should have resulted in her being removed from the house immediately and permanently. No two ways about it! Something like that is as bad as a physical assault, and we already know BB removes any HM who assaults another HM, no matter what the verbal provocation may have been. I still think BB has made a bad mistake in how they handled this incident.
A pity Bear is not intelligent enough to have realised he could have used the spitting incident to his own advantage, i.e. by staying calm and insisting to BB that Aubrey must be removed from the house or he wouldn't stay. I can't see BB could have refused if put on the spot. Bear would've had the sympathy and support of most of the viewing public.
Personally I can't stand the guy, but would have felt very sympathetic to him, if he had handled the situation wisely instead of throwing childish tantrums like a 2 yr old.