My first ever post -- Yippee!
I know what she means about the word master. I find that difficult to get my head around as well - I have trouble with role-playing of any sort, actually. I find it creates a distance between the core of my desires and the reality of what's happening at the moment. Literally speaking, I am not a slave in the 'real world', so calling someone master feels false to me. 'Sir' is simply a term of respect - perhaps she would find that easier?
Cheers to everyone in this forum, by the way. You are all so supportive of each other, and give great advice!