While Cassidy was looking at Grey, he mouthed 'this time?', not sure what to think other than being stunned that this was something that she'd done before, apparently without thinking of the potential consequences. "I appreciate that you want to help," he said diplomatically, "and there's no doubt that help is needed. But there are other ways to fortify poor soil, ones that are far more sustainable than blood ritual. Sharing your expertise would likely be just as valuable to the people here as sharing your blood." His lips quirked in a bit of a wry smile. "And far less likely to give your husband heart palpitations."