Teaching My Gf: Secret Longing

The second chapter of my Kayla and Dave series. This chapter includes more sexual themes.
Once again I hope you enjoy and welcome any feedback as well as suggestions!

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We found ourselves moving most of Kayla's furniture to the edges of her wide living room to make some space for practicing. I helped her stretch and warm up, and explained her the very basics of all the different martial arts I knew. (Tae Kwon Do, Boxing and Wing Chun)

Then we moved on talking about groin strikes which Kayla seemed to be really fixated on and constantly asking about. She seemed to love the idea she could incapacitate someone with one strike even someone bigger and more muscular than her. It was making her feel safe but she was anxious about getting it right. So I explained various groin strike techniques for various situations, which she wanted to practice as soon as possible. I excused myself to the bathroom several times during this lesson, saying I must have drunk too much beer. Always to drown my raging erection hoping she had not noticed it. One time she slowly brought her foot in a kicking motion towards my groin stopping a few centimetres away

"My cute foot's revenge for you not wanting to massage it" She giggled at her joke.

"I never said I wouldn't do it!" I protested

"Oh so you would?" I was feeling uncomfortable and she had caught on but she seemed to enjoy bringing me in this awkward situation.

"I mean if you wanted me to sure I would! For you!" I yelled as I turned around dashing towards the bathroom. My hard on was raging by that point and I was praying to each and any deity I Knew she had not noticed
"Oh come on! You just went to the bathroom!"She complained but I ran for dear life.

Right after I was back and with some more self control I shown her a few knee strikes. I executed them on the air myself but she felt she could not practice them without a target. Thus she asked to practice on me. She had me metaphorically and literally with my back on the wall as she tested the fit of her knee between my legs.

She began practicing the move a little roughly and I tried to strafe my thoughts into something else. Anything to keep me from getting an erection, as she kept raising her knee between my legs with more and more force each time, but always stopping long before she would strike my balls.

To no avail. I could see her beauty. Smell her scent. And she was pretending to be doing to me what I yearned for her to do to me for real. What a man could do but grow a boner?

Why couldn't this be real? My mind kept wondering

"Babe try to bring your knee closer to its targets. If you learn the move wrong you wont be able to measure the distance properly when executing the move for real" I advised her

"But what if I strike you by mistake? I am not very good at this and I already hit you once..." She said apologetically

"Well I trust you and even if you do I will survive you are not using too much force after all. I mean it's very important for you to learn the move properly so you will be able to defend yourself, I am willing to risk a light low blow for you"

"Dave you are so sweet! Thought you shouldn't really trust me you know I am clumsy!"

And with that she began bringing her knee closer and closer. I could not resist the urge. I was young. I was horny. I adored this woman and wanted her to bust my balls for so long.

As her knee was coming up I slid slightly down and... *WHAM*

The impact shook me a bit as I grimaced in agony.

Kayla was looking at me wide eyed. My groan of pain was followed by Kayla's... moan? It was hard to focus on anything else than the sensation of the low blow so I was not sure. But it sounded almost like a moan of pleasure.

"Oh babe I am so sorry!" She yelled "I told you I am clumsy. It's my fault! I should not have pressured you into this and..."

"No no! It's fine!" I said straightening up "We know you are executing the move properly besides you just grazed me! I think it's important for you to repeat it, since you got it right so you memorize it right!" I had to know! Had she moaned in pleasure? Was she enjoying that? I had to make her repeat it?

"Su... Sure? Are you sure?" She asked her eyes lighting up, as if she was glad I was telling her to continue

"Yeah babe I am fine! Besides your safety is what comes first!" I insisted

So she brought her knee up once more striking my balls lightly once more.

Again I think she moaned in pleasure as I doubled over. Looking up in her eyes I could see the deep within them a spark lighting up as she watched me react to the pain she had just caused me. She was biting her lip, her cheeks were flustered and I could see her nipples protruding through the thin fabric of her loose white shirt.

She was enjoying this!

"Again..." I almost begged spreading my legs.

Kayla was looking me almost in trance but she nodded gaining confidence from my obvious consent.

And with that she jerked her thigh against my groin not once nor twice but three times in rapid succession, moaning loudly each time her knee struck my balls.

"You enjoy this" I accused her while the pain kicked in and I collapsed forward only for her to catch me in her hug.

"Da... Dave I don't know what came over me... I just felt so powerful seeing you suffer from the pain I had caused you. Oh my god I am such a horrible person! I...I... "

"Shh... It's fine!" I reassured her "Kayla I adore you. If you enjoyed doing that to me that please keep doing it to me"

"But..."

I was not going to lose the opportunity of a lifetime. In my wildest fantasies the thought of ballbusting was so arousing because I fantasized it was bringing pleasure to the woman punishing my testicles. That I was suffering for her, from her, through my manhood. It was the ultimate sacrifice of masculinity to female nature.

And Kayla was just now discovering she was enjoying this sacrifice. We had the same fetish. The one I longed so deeply to experience. I had to destroy all her qualms and truly allow herself to enjoy this with no guilt if we were to experience this together.

I hugged her back tightly pressing harder against her, grinding against her knee so she could feel my erect manhood. My hands began exploring her toned backside, her left hand grasped the back of my neck while the other began caressing my chest. I brushed my lips against her and tasted the intoxicating sweetness of her breath. Tracing my lips into her ear I whispered a single word "Again..."

"Mhm" Her voice trembled in my ear, obviously aroused.

She placed her hand on my shoulders and slightly backed away.

My hands could feel her butt clench tight as she pulled her leg back.

Her gaze, intense and fiery, found and locked in mine. She smiled sweetly as I got lost in the, almost hypnotic, beauty of her aquamarine eyes. The spark of illicit excitement lighting up in their core. She looked lost in bliss. Oh my god I wanted nothing more than this woman to be happy right now!

She puckered her lips and moved them closer to mine. It was coming, I made sure to open my legs wider for her. The sweet fragrance of her breath filled my nostrils, as she exhaled heavily near my lips but never touched.

And with a loud moan of pleasure she let me have it! WHAM! In one swift motion she bore down on my shoulders and launched her knee forward, drilling it between my legs and driving it against my already aching balls, with more force than I imagined her delicate feminine form could muster! I could feel my twin nuts being smashed flat against the unforgiving hardness of her kneecap, exploding with pain under the force of her blow!

The pain spread to the rest of my body making it weaker, with the exception of my ever growing erection. I never had been as hard before in my life and I could feel precum leaking from the edge of my cock. I did not want this to stop. However my knees had different plans as they struggled to keep me standing.

She sighed in perfect bliss and relaxation and it was obvious that she had just orgasmed.

I barely managed to muster the strength to whisper "Thank you!"

As I slowly collapsed to my knees and almost instinctively I began kissing her on my way down. Starting on her neck, then her breasts, with their hard nipples clearly visible through the thin fabric of her white shirt, her thin midsection and finally her pubic area.

I kissed all around her vulva, teasing her outer lips and not once touching her clitoris. I only caressed it with my hot breath, before moving on to her thighs but not before looking up at her giving her a devious look.

She looked down on me with a hint of surprise "You find it wise to challenge me right now?"

"Depends on what I am trying to achieve" I answered.

"You are so dead" She answered playfully but her tone changed abruptly to her domineering one as my lips touched her knee. "Uhm... That's it! Kiss the knee that obliterated your balls boy!" And I did exactly as ordered, planting kiss after kiss on her kneecap for over a minute trying to convey my adoration and gratitude for what it had done to me. Finally I moved on to her muscular calves. I was unsure of whether I should move on below her ankles. Kayla had just discovered that both of us were into ballbusting, and I had told her I find her feet cute at the begging, but I had not received a clear answer on whether she was okay with it.

She beat me to it before I could decide whether to bring up or not, raising her foot to my face, her toes dangling right in front of my mouth. "I know you want to taste them" She urged me.

Startled as I was it took me a few second before touching my lips to her toes, and she beat me to it once more ( Third time if you count her beating my balls )

"Uh-uh!" She giggled stepping backwards.

"That's what you get for teasing me, Mister!" She added gracefully whirling around as she walked away. She was giving me a great look of her toned legs and glistening with sweat arches, as they would stick to the floor with each slow step she would take, making my cock twitch with excitement. She circled the room and turned back to me who had been watching her in trance.

"Silly me! You get more! Here's the interest!" Her face lit up as if she had just remembered something and suddenly her toes rammed my unsuspecting nuts, digging deep into their flesh.

I gasped and doubled over, as the waves of pain radiating through my body were renewed. She lifted my chin with her foot, so that I was looking at her.

"I think that's enough self defense practice for today... But if you got the balls to keep playing with me" She purred putting extra emphasis on the word balls "I'll be awaiting in the bedroom upstairs"

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