Fisting my Ass with a full Bladder until I Squirt

Finding the limit while playing on both holes! Do you know the feeling when you're so full and you're sure you can't take any more? Turns out there's always a way to go further: After all this baldder training I can now take 1,5 liters with no problem. The feeling makes my belly tingle and the urge to release it increases with every second. But I can hold it. I need to squeeze it even more. Pushing a balloon up my ass barely works and when I start pumping it, the intense pressure floods my body with hot and cold showers. The Balloon in my ass starts taking up more and more space s my bladder is pushed out even more. The bulge is huge! Pushing out the balloon almost makes me cum on the spot as I erupt with squirt. But I know I can take more. It's time to try this for the first time: Fisting with a full bladder! My ass is ready and my bladder feels like it wants to explode as I spread my ass. Going gentle will get me nowhere now. I know I have to go fast if I want to make it inside.