An Unexpected Member - Natsuki

After seeing all that erotic manga, Natsuki decided to buy an aphrodisiac; supposedly claiming to enhance sexual performance “beyond your wildest dreams”. She took a very small sip from the 150ml bottle, there was barely a flavour but it was bitter on the tongue; that sensation faded shortly after the liquid flowed down her throat. After a few seconds, nothing happened. Natsuki pouted and grabbed the bottle to throw in the bin, to cover her tracks. As she reached to grab the container, a warm feeling surged over her body, but the sensation grew exponentially in her “”click””. She covered her mouth with one hand, to stop the moans from alerting anyone, and one hand over her panties. To her shock, she felt a bulge poke into her palm; sending a shockwave of pleasure through her body. As she felt the bulge grow in size, she moved her pants to the side to let her new love muscle get the room it needed, and to relieve herself. It felt good. Too good. Feeling the dick grow in her hand just gave her more pleasure, and it was starting to outgrow just the one hand. Panting and biting her lip, she placed a second hand over her member and started pumping. She couldn’t hear the door open from the heavy heartbeat echoing through her body and being entranced with the growing member, feeling the veins bulging, throbbing with overwhelming pleasure. After 30 seconds, the warm feeling faded and the heart rate steadied. She took a moment to compose herself, feeling dizzy from the whirlwind of pleasure and the bodily change. She slowly looked down… a 12+ Inch love spear, thicker than a Monster can. She was in awe in the size; but she wanted to try out her new “toy”. After all the commotion she caused, Yuri checked in on her. Yuri dropped her book, as well as her jaw. Natsuki locked eyes with Yuri, Natsuki would usually shy away if she was exposed, but this time she wanted to show off almost. Seeing Yuri’s face fill with Terror, but also desire; almost like she was mentally preparing herself for something. Natsuki shifted her gaze from Yuri’s deep, amethyst eyes and down toward her breasts, pressing up against her shirt, as if they were teasing Natsuki to release them from their clothed prison.  Natsuki already thought Yuri’s breasts were big enough but what would the “aphrodisiac” do if rubbed directed onto her chest.