I am looking for some advice on creating a bit of a back story/reason as to why a succubus would be my cohort. We are playing a high level evil campaign, and the idea of my succubus was approved based on the grounds that I come up with a good back story for it. As such I have been rolling ideas around in my head and nothing seems to sound good or mesh well. It doesnt help that my DM is a rule nazzi like no other and has already made it clear, that from time to time he will be taking over control of the succubus. Just looking for a few ideas on a reason to why my character would have a succubus as my cohort or on my payroll.