I'm not a Dom and I have little experience, so take the following with a few grains of salt. I don't like being punished - it makes be angry, sullen, rebellious and resentful. However, I have found I do like some pain. I have no problem with it being included in play. I want to be flogged just for the fun of it. Is there any reason you can't just spank her for the fun of it - or is the element of "punishment" part of the fun for you?