Leah could see that Matt was getting uneasy, so she took the desperate way out. "Ok look, here.." she pulled out 2 extra blood vials, one labelled O- and the other B-, and held them tauntingly in her hand. "If you help her, then I will give you these vials as a reward, but you guys have to be gone before nightfall. If not, then I will personally see to it that you two don't leave here at all." It was the only thing she could think to do. Even though she knew that Matt was aware it was a blunt threat. Leah was unarmed, but she's been able to get herself out of sticky situations before. After all, she had a scalpel which would suffice for now. Yes, it could potentially make things worse, but they couldn't be caught out here. Zandrea was now another pair of eyes and even though Leah knew she wouldn't say anything, she would be in trouble too if word got back to SOLDIER. 

((apologies for this post... I know it's not the best but it's kinda all I got at the moment :/ ))