Well it was BB being truly evil. Setting friends against each other. What Ahmed should realize is that both Michelle and Jason had to have a sense of loyalty to each other.
Iff either one had spilled the beans then the other would have suffered the cosequences. It was and could still be a no win situation for the seargents as when nominations take place next week. The others just might take the forced betrayal into account and nominate them both as punishment...