You can feel something just below your chin start vibrating. After a few seconds it pushes out into 2 distinct yet rather small lumps. With each moan of the woman however, they begin to bloat outwards more and more. You stop sucking her newly formed cock to look down at these developments and begin to smirk. What are growing are 2 tennis ball sized testicles. However, you want more. You continue your assult on the woman, making her moan more and more, and her balls doubling in size each time. You grope them and play with them to coax more tasty semen out of them. Not long after your stomach is filled with her cum, the sheer volume being enough to make a big bulge that's only growing bigger by the second. It's not enough though, no. You need MORE. Spurred on by the woman's bounty, you increase your efforts, encouraging her cum tanks to grow bigger and bigger. They quickly fill the size of the chair but don't stop there. Your constant touching and feeling them only fueling their growth and their cum output. It's not long before they fill up the entire front of the car. Letting go of the massive mounds of flesh and releasing the woman's cock with a loud 'POP' you look on at your handywork. All that's visible from the windows is a huge wall of skin. Smiling, you ponder what to do next...