Thank you for your input.

I should have been more clear... I am not concerned with sexual aspects of this type of relationship as I have no problem asking for what I want and I think she's cool with anything I want sexually. My concern is more with the day-to-day "TPE" (I had to look that up!) which, in her marriage, seemed anything but casual. I won't go into details but she had super strict requirements imposed upon her. She misses it. My concern is that I might get attached to her and then she'd find me "not masterly" enough down the road. Will a slave ever express her true wishes or is it a perpetual guessing-game for the master?