The big issue with further checks on her are that y'all keep changing your requests, and she suspects your interests are actively aligned against hers since she's associated you with your non-masked selves who took Jacey. You wanted her eggs, and she denied having any. Then you wanted to help clear the tunnel, but now you're asking for access to company records. She has no idea who you work for, and she thinks you're actively working against her, so she has no reason to cooperate with such demands regardless of how well you roll.
So, a further Negotiation check would indeed be RRR vs. her, but you'll need to ask for something she'd be willing to actually give up. Access to the tunnels under guard might work. Unrestricted access to the tunnels or to company records is likely to be denied, short of a Triumph and some convincing arguments.
Rolls
Coercion + SP vs. Nekurr
3 Success, 4 Advantage, 3 Failure, 1 Threat
Total: 3 Advantage
purple
2 Threat
Total: 2 Threat