"I'm not her keeper" is also a choice, though some guides suggest it may be less effective for the romance path. To Betray Panam (The "Snitch" Route)
This protects Panam’s plan to steal the Basilisk and keeps you in her good graces. "I'm not her keeper" is also a choice,
Instead of replying via text, you can physically go back to Saul at the Nomad camp and tell him about Panam's plan. Rewards: A free Mizutani Shion "Coyote" (red variant). A large sum of Eddies (€$27,000). "I'm not her keeper" is also a choice,