Gloria continued grinning as she watched the fly that was Barbra gingerly walk around on her breast. Her boob flesh was soft and she could tell Barbra was having trouble learning to walk on it.
Not only was the ground uneven and moving, it took some time to get used to six legs. Gloria remember her own trouble at the task and was happy to see it wasn't just her that struggled to learn it. She marveled at Barbra's tiny body, amazed that just an hour ago Gloria herself had looked just like that.
It occurred to her that she could end Barbra's life with a simple swat of her hand. She hadn't realized exactly how vulnerable she had been as a fly. Seeing Barbra in front of her now really made it clear to her.
The thoughts of being so small and helpless resuscitated Gloria's arousal and she noticed her nipples begin to grow, poking through her swimsuit like little mountains. Well, little to Gloria. To Barbra they were rising up above her head, quickly approaching the size of a city bus, comparatively!
Any doubts Gloria had about the identity of the fly were washed away as she watched it gently climb to the top her nipple and happily buzz while turning in a circle.
"Yes," Gloria said. "You caused that. You have no idea how hot this is! Just seeing you so tiny is really turning me on!" Gloria shifted her hips, realizing her entire body was responding, not just her nipples. She spread her legs ever so slightly as she felt the junction between them warm up.
Just then, in one mere second, Gloria saw another fly dart out of the bush behind her and pounce directly on Barbra's back. Gloria yelped, afraid for her friend's safety. Indeed, Barbra was panicking too. Her thin limbs wobbled and flailed as she tried to run but found she was too confused and startled to work her new body. All she managed to do was fall down against Gloria's massive swimsuit.
Gloria was about to shoo the other fly away when she stopped, her eyes wide. It had only taken this interloper two seconds to begin his task and Gloria now saw what it was. "Barbra!" she cried. "You have a suitor!"
And, sure enough, Barbra the fly was buzzing and vibrating, stuck to Gloria's nipple as she was mated by an aggressive male of her new species. Barbara's mind reeled as she felt body parts she didn't used to have interact with the quick-moving insect behind her. Gloria laughed. "Don't stop because of me. I know what you're feeling right now. Enjoy it!"
The female fly actually tilted its body upwards to get a better look at the giant woman above her. Had she actually heard that right? "Yeah, you heard me" confirmed Gloria. "I got fucked by a bug earlier. Same as you are now!" She laughed again, a low booming noise that would have frightened Barbra except for the distracting pleasure she now felt beneath her abdomen. She had no idea that being mated as a fly would be so exciting, but it certainly was! And having the gigantic Gloria looking down on her as it happed was just icing on the cake. Barbra's mind was on fire as she had one of the best sexual experiences of her life.
Gloria continued watching the tiny creatures enjoy themselves on her pointy nipple, now harder than ever. She watched, now getting a third-person view of what she herself had recently experienced.
"Have your fun," she said. "But you owe me more fun when you're done..."