First Time With Mom Until I Fainted (r-18)

The pain I felt was so brutal. My special ring stretched to the limit; I felt like my skin was going to tear at any moment.

 

But my brain reacted in an unconventional way to pain as it always does. Apart from the pain, I also felt a pleasant sensation against me that led my hands to cling to any nearby object as if wanting to save me from drowning in the ocean.

 

My mind was filled with bright white and I almost lost the ability to think when a burst of dopamine flooded my brain and body.

 

My muscles in my gut were acting in a contradictory way. They squeezed and moved in a way they wanted to expel the invader, but they also pulsed and held the invader so as not to let it go and even make a contraction movement to make the invader penetrate further.