HELP!!! I need to make him my pussy slave!

So my partner is usually the master and im his cum slave. But he wants to change it up for one night to where i make him my pussy slave. The thing is, that right now we are having to get each other off over the phone, and we usually do a great job at it. But i have no idea how to be a master. I need your help on what are things i can say to get him off. he LOVES dirty talk. Teach me how to be a good master! what are the best things i can say and tell him to do over the phone to make him cum like a fountain. This questionis mainly for guys since they know what gets them off the best during masturbation :] thanks in advance!

 

just initiate everything.

 

Im terrible at dirty talk though. If I was ther in person I would be able to dominate him. But over the phone its much harder. I dont know what I would say, or what i would tell him to get him off. Thats what I need help with.