Three years into my marriage with my wife, Aoi, we made love every time she ovulated. However, her expression during sex started to resemble that of an acting sex worker, and gradually, my confidence and the frequency of our lovemaking decreased. My wife told me that size doesn't matter and that love is more important. But my anxieties remained. To prove it to myself, I invited a friend with a large dick to have sex with my wife. On the day, watching my wife being licked by my friend and struggling to feel anything from his large dick, I was suddenly overcome with regret…