I can think of a reason. If the affair rumor is true (and she's meeting up with the guy and hopping into his red car) then she's tucking her car away in the bushes hopefully insuring that anyone that she or her husband might know (a friend or maybe someone in JC's platoon) doesn't see it and say something to JC.
Mel
There's far better places to conceal a car for a planned affair excursion.