Dear Mistress,
Just to say that what I have experienced with you has made so much difference to me.
Without you, I would never have taken such a step and had my eyes opened in such a wonderful way. The way you took my thoughts and ideas and made them real with confidence and reassurance is a blessing. I am now so comfortable with my feelings and needs, and glad to know that I can be understood by someone such as you. Thank you, from the bottom of my heart.