This is my take from this clip:
Desiree/Melanie are still standing & only Tom has not been chosen yet.
Desiree has the power to chose a partner no one else can choose, she will likely choose last. Whatever woman she sends home, will then in turn have the power to take a male quest with her on the way out. This will leave 4 couples & will leave a woman without a roommate & it will start all over
following monday-2 couples
following Wed 1 couple
Just a wild guess. But I am sure they will mix this up to keep people guessing. But I think this will change the game dramatically!