As a surprise, but not for long

"Oh, my god...!" Lily kept moaning out loud as Emma went down between her legs, licking and rubbing at her soft crotch through the thin material of her panties. Her hips bucked up against her friend's face, while her hands grabbed at the long mane of red hair.

Emma was overwhelmed with lust however, and didn't let herself be held down for long. Rising back up again she grappled with her friend and managed to steer her up onto her knees, with her hands and chest bracing herself against the back of the couch.

"Oh, Emma... What are you doing to me...?!" Lily half giggled, half moaned as she could feel the other woman pulling her panties to the side and running a finger along the wet snatch underneath. Then her friend grabbed at her skirt, using it for leverage while she stood herself back up behind her.

By now Emma had already worked her way out of her own skirt, and watched as her new appendage bulged obscenely through her tight little panties before allowing it to burst out into freedom. It was her cock doing the thinking now, and all that she wished for was to stuff as much of it as she possibly could into that wet little pussy that was now fully exposed in front of her.

"Aaaaannnh...?! God...!" Lily squealed and gasped in surprise as she was shoved down hard into the sofa, having the air knocked out of her lungs as she was impaled by something both bigger and harder than the cock she'd grown used to. "M-my god, Emma...?! W-what is that...?!"

"My little secret..." Emma replied with a smug smile as her friend tried to look back at her over her shoulder, finding the look of shock in her big blue eyes to be strangely arousing. She'd only been endowed with a cock of her own for some half an hour, and she was already in love with how she could use it.

"Don't you like it...?" She continued while starting to pull back out again, but not waiting or giving one damn about the answer before plowing right back inside. Lily squealed again, even louder now as the cock bottomed out inside of her, and her fingers dug deep into the back of the couch while her friend started fucking her like she'd never been taken before...