Erika waited for her mother to leave the house, then exited her room to sit on front of the TV. She threw a cushion over her lap, focusing on the tv screen instead of the thing between her legs. Hopefully the bulge would go away...
She stopped paying attention to it quickly enough, but did not realize she was squirming and pressing the cushion on her lap. In a corner of her brain the hard bulge was still annoying her, so she was absentmindedly rubbing her groin through the cushion. She was becoming wet from the hard pole and the lubricated fabric of her panties added a pleasant feel to the subtle grinding.
When she realized what was happening, it was too late: all of the sudden she felt a surge of goo burst from the member and through her panties. When she lifted the cushion she saw that there was a wet spot on it as well as on her skirt. Her panties were also soaked.
Erika noticed that the bulge, although softening, was pulsating slightly. When it stopped, she could tell it had grown again from the first time she saw it. She pulled her panties to look inside, and the soft tube looked over 3 inches now. It was like shooting stuff made it transform into something bigger!