Faction member with +100 relation?

[Almogavers]

I have a vassal who has joined a faction with +80 relation with me. I've bribed him, now his relation is +100 but still remains in the faction. He's a viceroy, quite powerful ...

How can it be possible? What can I do?

 

[Iron Chariots]

Most likely the faction leader used his spymaster to scheme him into the faction or used a favor to bring him in. If you can either get the leader to leave the faction or use your own spymaster to scheme the high-relations vassal out, you should be fine.

 

[Ayetach]

Edit: What Iron Chariots said.

 

[Almogavers]

Thank you!