There is a very, very low sinking feeling that Darcy's gut drops into at that. Because Darcy does not deserve for Ava to feel that safe around her, has not succeeded at their relationship enough for it, and...

She feels somewhere beyond herself, to a thread pulled taut connecting herself to Ava, and snaps it. It's the same thing her Geist used to keep her calm during big fights, but turned outwards instead of inwards.

"Fuck-" she hisses as she feels the Marionette end, "Ava I- I didn't know I could do that again- I didn't mean to- I'm sorry-"