Gentle Domme Learns

So I have a gentle dome who mostly wants me to rub her down and lick her, which I do dutifully.  She sometimes lets me stroke myself by I’m not cumming.  She is a quiet and shy person so near I could tell she wasn’t into really punishing me.  But as I’m jerking in front of her, I decide to ask her to kick me in the balls.  She hesitates and says I don’t want to hurt you.  I say please. She decides to do it and I feel the sharp pain.  She squeals in delight at what she just did.  She does it a couple more times, each time with a new grin on her face.  When we plan to meet again I text her that I think she enjoyed it.  She doesn’t respond.  We meet and I ask to be kicked in the balls again.  She says nothing, but quietly does it again and once again has that smile on her face.  I know she will do it harder next time as she embraces her power.