By this point, Emma was feeling rather full. She had eaten dinner before driving over, but that was beside the point; Jen had shot almost half-gallon of cum in the last twenty or so minutes, a good deal of it making its way down Emma's throat. This didn't mean, however, that she didn't want more.
Taking Jen by the hand, she pulled her up from the couch and pressed their bodies together. She queezed Jen's round ass hard and ground her clit against Jen's cock, through her legging still. Jen fluidly removed Emma's cum-soaked sweater, then proceeded to clean her jizz off of Emma's body, from her neck down to her breasts. She was hard again, her dick squeezed between Emma's thighs.
Emma's eyes rolled back into her head as Jen's hand slid over her clit. Her soft fingers combined with their natural lubricants and the pressure from the elastic in her clothing was too much to bear, and she started to moan loudly. Then she felt something grow warmer. At first, it was like the feeling of losing her virginity - that first sense of penetration and total vulnerability - except it was the opposite. She felt her confidence, her lust, and her clit swell. Jen had of course noticed, but preferred action to words, and dropped down to her knees.
As her balls plopped against the floor, with the tip of her dick hovering in the air around Emma's knees, she buried Emma's new cock in her throat. At first, she gagged; last time she deepthroated anyone it was a mere 6 inches. But soon she had Emma balls-deep. Emma gripped her hair into a ponytail from behind and thrusted against Jen's face, which Jen took effortlessly.
Jerking herself off with the fluids dripping from Emma's cunt, Jen made yet another little mess on her living-room floor. Thank goodness it was hardwood. Glancing up at Emma, she saw a very red face and pair of tits from a new angle, and one that she rather liked. Emma's eyes looked down at that moment, and Jen's eye contact was so strong that Emma shot her first load of jizz down Jen's throat.
Almost like Jen's first penile orgasm, Emma found herself expecting more cum than she really produced. But her cock didn't get any smaller afterwards, and Jen felt so good. Jen didn't have any time to warn Emma about what was coming next. Half yelling, half moaning, her muffled vocalisations only pushed Emma further into her throatfucking, and Jen had never felt so used before, not even by any of her most twisted partners. Pleasure and terror tore at her body, and she squirted for the first time, her pussy spraying against the back of the massive ballsack that now hung in front of it. Of course, this sensation prompted a second orgasm, and cum erupted from her cock in thick, heavy ropes that splashed over the glass coffee table across the room.
By this time, Emma's young cock had doubled in every aspect of its size, and her precum alone was dripping in beads from Jen's chin and left nipple. She felt her balls swell up from grapes to eggs to a bit larger than that, and massive contractions flooded Jen with her semen. Jen, just finishing her previous orgasm and already in tears, simply dribbled cum uncontrollably, long after Emma had finished. Pulling out her cock, Emma came in her pussy as she watched its sponge-like shaft swell back up outside of Jen's tight throat. They both lay on the floor moaning for a while before Jen spoke up.
"I don't know why I have this, but I think I gave it to you. Probably... in my cum. I'm so sorry Em-" Jen's lips were interrupted by Emma's cockhead, which was nearing her own in size.
"It's not too bad.... I think there are a few ways you could... make it up to me." giggled Emma, dragging her unit over Jen's face like a toy. A smile crossing her face, she squeezed her dick at the base and painted a streak of white down Jen's forehead, pumping the rest into her gaping mouth. Jen closed her lips around it, reaching up and gripping the C-cup breasts dangling over her. To both of their surprise, a thin spray of milk fell from her erect nipples. "Everything feels a bit full yet, doesn't it? We're in the same boat. Might as well help each other bail it out. We can ask questions later, if there ever will be one."