Since our initial foray into ballbusting, my gf has quickly grown to appreciate how much it turns me on, and better yet she has found that she really enjoys the reactions she can get by beating on my nuts when she can tell I'm getting excited.  It is now very common for her to punish my balls when we are fooling around, but so far there has really only been one time that she smashed my nuts when there was an audience present.  

She had only busted me once or twice at this…