It seems that the plan was for everyone in the alliance (plus Bayleigh) to vote for Dee, which production provided nothing leading up to that. They showed no one rallying votes for Dee. That threw me off when I watched the first time. That house vote made no sense to me whatsoever because production threw away all the context to cut Dee out. I couldn't understand why the girls seemed like they were burning votes on each other. It seemed like there was no plan and they were winging it on the girls vote.
The plan was for everyone to vote for Dee, which explains how and why Fessy ends up voting for Dee, breaking with his "Team Old Buck" alliance who voted for Jenny. In exchange for Johnny and Kyle not nominating him into interrogation, Fessy votes for Dee and Rogan. The tribunal was on board with this plan. Bayleigh, Melissa, Jenny, and Fessy were supposed to vote for Dee. Dee gets voted in by the house, and maybe the Tribunal picks Bayleigh. This is what I believe the plan was ultimately supposed to be.
It is also my understanding that Dee, at this point, knows that she was outed to Jenny about targeting her. Jenny mentions them having "problems" in the house vote.