Had to go back to Grahtwood for a missing mission, and this was it. I enclosed the rest within the "spoiler" brackets.
You have to accuse one of the three, even though none are truly guilty? She ordered a flower already cut. She didn't commit the act, so she didn't break the Green Pact. Her husband found the flower, after it had already been cut, so he didn't do anything wrong. The Khajiit cut the flower, but he isn't bound by the Green Pact, so it isn't just for him to be involved in any of this. How are you supposed to subject any of these individuals to the "justice" chamber? Who did you accuse?