"Again!?" Lily shrieked upon realizing that her cock was hard again. She'd just taken care of this! "He can't see me like this..." She needed to calm her erection down. She closed her eyes and spent several minutes trying to calm down, she needed to learn to control this thing. But no matter how hard she tried, her new equine shaft kept throbbing, her mind was invaded by horny thoughts, she finally had enough and let out a sigh. "Fine! You win." She wrapped her hand around her shaft and started to pump, slowly at first. She closed her eyes and thought of Casey, of times they had shared together, and found that it did nothing for her, her cock throbbed but no pleasure came at the thought of her sex life. "Come on!" She whined, she ran through different scenarios in her head, nothing was working! She sped up, vigorously jerking her furious meat. Eventually, an image popped into her head that sent her reeling, the idea of her fucking Casey with her new equipment sent a spike a pleasure through her shaft and a spurt of pre across the room, she gasped and kept going, the thought of ramming into her boyfriend was really getting her off! She imagined his cute little hole stretched to accommodate her length. A heat was burning deep within her, it felt like it was coming from...her ass!? She leaned forward from the toilet and reached a hand back, eventually making contact with a large, puffed out asshole, a horses asshole, "Gross!" Lily whined, yet touching the rim sent pleasure spiking through her cock. She circled the rim with her finger, her fantasy was shifting, it was Casey touching her Donut hole. She moaned loudly and in her stupor, she accidentally slipped two fingers into her throbbing hole. "OH!!" Lily had never felt this good, sex had never felt this good! She felt like she was losing her mind as she thrusted her entire hand into her asshole. Now she imagined Casey fucking her throbbing horse hole, she'd never thought about anal before, now she wondered why, this was amazing! She thrusted her cock into her hand and then slammed her ass back onto her other one. The fantasy changed one last time, she was now fucking a large mare underneath her, while she was being fucked by a dreamy stallion, this was bliss this...this was too much! "OH...FUCK!!" Her balls tightened, her hole squeezed onto her hand, her cock jumped and exploded with a spray of chunky semen, coating the restroom as she helplessly moaned and squirmed. Her orgasm waned, and she pulled her hand out of her ass, she fell back onto the toilet and panted, she had never felt that good before. Her cock shrunk and returned to her sheath, and Lily was left to ponder all that had just happened to her.