The tension and anger here isn't being defused by her apology, but neither is it heightening, forcing one of them to say something they'll regret. Darcy feels caught between staying and leaving, and even since getting a better handle on her abilities here, she feels the prickle of Stillness at her extremities. All of this would be so much easier if she hid away and stayed silent and did nothing. Then Skulduggery wouldn't be mad at her, and the tangled feeling of her own anger and hurt mingling with knowing she'd disappointed him would abate.

"You showed me what was in the drawer," she states again, circling back to facts, her voice low and tense, "what is it about these fucking gauntlets anyway?"

Darcy's going to needle and prod until she gets an answer or he snaps, and the jury's out on which she thinks will come first.