"No, I don't trust you because I don't like your motives. You are hidden what you really want out of this" Leela said, "And I don't trust Maria simply because she is pretty. I'm usually a good judge of character" She also had a habit of wanting to help those that didn't think they could be helped, but she wasn't going to say that. "I trust her because..." She trailed off, thinking that Maria would rather not let her explode out the expression she had seen on the girls face, "Because she let me drink her blood, because she could have easily recaptured me as I lay here helpless on the floor" 

"I don't trust you, because you chose to control, zombify, and force to fight defensive humans. I don't trust you because you think using your power to simple make people sick is a moral boundary over stepped" 

Leela deliberately stepped closer, "You can't say you trust me, if you did..." She held out a hand, "You'd let me see if I could heal away the more disgusting aspect of your appearance" 

It was a challenge, and Leela gave an innocent smile.