While David Cook
prepares for this week's two-night American Idol
season finale, PEOPLE has learned that it is unlikely that one of his biggest supporters, brother Adam Cook
, will be in the audience.
Adam, 37, who has been battling brain cancer for the past ten years, was able travel to Los Angeles to see David perform
live on April 15, but will likely stay home this week due to his condition.
Adam's health is "a day-to-day thing," his wife Kendra told PEOPLE last month. "I can't look at tomorrow. I have to look at today. If I start planning out and thinking about too much in the future, I can get overwhelmed in all the details. I have to concentrate on today."
David Cook and David Archuleta
will go head-to-head on Tuesday's live performance show from the Nokia Theater in Los Angeles. The results will air live on Wednesday's two-hour season finale.
Cook supporters will host a viewing party in Terre Haute, Ind., where Adam lives, on Wednesday, but Adam, Kendra, and their two young children, will most likely watch the show from their home. --Pam Grout