Kimberly's tongue teased Emily then she crawled back up the succubus' body.
"Don't tease me like that!" cried Emily. "I need you to pleasure me!"
"Oh, I will" promised Kim "but first I wanted to know: how much control do you have over your tail?"
Emily didn't know the answer to that question, but a little concentration and her tail was soon rubbing against Kim's leg.
"Great!" Kim said with a smile and she slid back down Emily's body and slid her tongue across the succubus' warm, wet slit.
Emily moaned. Kim paused then took matters into her own hands. Grabbing Emily's demon tail, Kim rubbed it against her crotch then slid it inside. And with that Emily learned no only could she control her tail, but that it was rather sensitive. Kim slid her tongue into Emily as Emily plunged her tail deeper into Kim. The two girls worked up a rhythm of alternating thrusts.
Kimberly could feel herself growing warmer with each stroke. Not just hot from arousal and exertion, but something else. She could feel her tailbone stretching and her forehead felt like it wanted to explode. Emily's back arched and she orgasmed, triggering a deep thrust of her tail that put Kim over the edge as well.