In this intense exploration of control and submission, our sissy crossdresser finds themselves in a vulnerable position, ballooning their urethra for a dominant partner. A catheter snakes into their delicate urethral opening, the tip pushing past the prostate, as a balloon inflates, stretching their bladder to its limit. The sissy's body squirms, trying to accommodate the foreign object, as their dominant partner tightens their grip, asserting control.