Kim cums first and loses

After 10 more minutes, the riggers upped the challenge once more.

Their box tie was wrapped around their breasts and connected to a pulley in the middle. The rope was tightened so that it was only long enough for one girl to stood upright, the other had to go on tiptoes to avoid being choked.

A bullet vibrator was inserted into their pussy and held in with lacy panties.

Kim and the other girl was told that their height was measured. Whoever was on tiptoe would have the vibrator at max power. Whoever cums first, loses. Essentially, the girls used their core and leg strength to perform squats, forcing the other girl to stand up on tiptoes.

The girls each became half of a see-saw. Kim used her core strength to squat downwards, forcing the other girl on tiptoes.

Yet, the uncomfortable position provided motivation for the girl. She too squatted and Kim was unable to hold her squat and was **** up on tiptoe.

Immediately, the bullet vibrator intensified in power. Her pussy walls were over-excited, her inner nerves stimulated by what felt like thousands of tiny fingers stroking her, her mind blanked out from the overwhelming arousal. She couldn't help but let out a loud shriek.

Until the rope went taut and choked her. Gasping for breath, she found some inner strength.

Up and down each girl went. Within minutes, their panties became soaked with their nasty cunt juices leaking out. Their clits were hard, sticking out like little erect dicks. Their muscles strained with the effort and their lungs heaved for oxygen.

Kim felt herself getting whoozy from the intense effort, over-stimulation, and ever-growing need to cum. It was not easy sustaining a workout when her pussy was crying to explode and let loose its wanton desires.

The girl sensed it too. With a final heave, she squatted. Kim tried to resist, but her legs could only kick helplessly into thin air.

The bullet vibrator was unrelenting, unceasing. Her labia, engorged with arousal, lost all control. Her orgasm pulsated from deep within her core, quickly radiating out to her clit, her pussy and her breasts. Her pussy walls contracted strongly, as though needing a bigger cock in her, needing to be filled deeply, needing to be fucked hard.

"FUCKKKKK I AM CUMMMMMING" she screamed, her inner slut unleashed.

Her pussy exploded with juices. Her grool soaked through her panties and ran down her thighs, evidence of the massive orgasm clearly displayed.

Finally, she was cut down from the bondage. Kim slumped onto the floor, exhausted.