Nobody negotiated a deal. Creed foolishly tried to commit Morek to a course of action Busto wasn't willing to pursue, and Malus didn't "offer" anything except religious tolerance. There seriously wasn't a deal. There was a period where PeL was pursuing any savior it could find, and people probably caught the stench of desperation. That doesn't mean Malus was running around slamming doors.
You know I was really trying to get Morek to destroy Solaria and make PeL our slave state I even came up with a way for us to insure that PeL never betrayed us. I was going to put Morek loyal nobles as the Dukes of PeLs city's. But I am stuck with a bunch of religious freaks in my realm plus I think Pierre von Genf was jealous that what took him 4 years to do I was going to do in a week. He gave me the hardest time in the inner council I wanted to death duel him but people told me priest don't duel so kind of scraped that idea.
I had the nobles to support it but not the important ones. If only I got Busto to join in on it with me and I could have had a slave state. Now I am barred pretty much from ever holding a official position in Morek anymore.