How much is due to Adele's influence ?
This is an elimination game, which Adele is playing with consumate cunning, even though her tactics may not meet with aproval.
The "bullying" can be seen as parallel what a pack of animals do to weaklings, they are dispatched so they do not drag down the rest of the pack. In this case however they are the competition and a threat that must be eliminated.
Let us not forget, Jade is hitting the alcohol big time, infact her mother is worried that she is turning into an alcoholic. Jade is not fully in control. Adele keeps a clear head. Jade already has a strike, and if Adele plays her cards right, Jade will be dispatched on the three strikes rule, with out Adele having to nominate her. Jade sees Adele as a soul mate, but in this cut and thrust, dog eat dog environment, Adele may just see Jade as a tool to be used, and a tool that is dispensible.
Remember how Alex was used by Sandy in his actions against the housemates. If Jade is to survive, she needs to sober up and regain some control.
(oops I sound almost like one of the psychologists they use
)