The Sentinels revenge is in the creator's hands

Her answer is what triggered something inside of him. Her suggestion at a trade for each other's talents.

Ford conjured a guttural snarl that echoed through the chambers of his chest like a beating war drum. How dare she assume that she had anything to offer the great Mayfair-Cairn children? It was a pragmatic pull that forced the titan to react. The pride he felt for what he carried and what he aimed to accomplish was far greater than the means to humbly obtain the numbers needed for such a task. She might have offered them what she could, but it would never be enough.

“You could offer us nothing compared to what you would receive,” Ford snarled, snapping his fangs toward her and aiming to strike against her flesh. It would be a test for her to pass or fail. Adapt, or die...

Still, his eyes reflected no emotion.