Hmm, I promise I won't tell anyone..! If they ask me where I got it, I'll just say I found it!

[ Madoka doesn't like lying, but if it's for Greed's sake, then she can probably manage. ... Probably. ]

.. Um, so.. Greed-san, please just hang in there.. you don't owe me anything at all, so please just try to do that. [ Because once she comes off her "someone actually asked me to help" high and all that, she realises just why this situation is a thing in the first place - because he's going to turn into an NPC. It dampens the enthusiasm a little. ]