Did chilly or logan cheat first

First off let's all agree that both logan and chilly don't nake good partners. But I wanna know if logan cheated first or chilly. I know chilly had that thing with Roy way back when but I've heard a rumor about Logan and Elaina not sure if that is true or just rumors. There whole co parent and past relationship thi g is a massive mess and it is hard to find correct and frequent info. I know it isn't our business but they keep letting little tide bits out lol