Protein shake (corruption)

Jane was often at my gym, lifting weight. She had a great build, muscular and all, with a pretty face. She was very popular for that.

One day, I noticed her drinking a protein shake with a brand I've never seen.

"Where did you get that?" I asked.

"I got it by mail, it's a sample for a new brand that will be sold soon."

"Oh, is it any good?"

"Actually, the taste at first was far from good, but, now it tastes incredible!"

"I'll have to look for it when it goes out, then."

"Yeah, ahah!"

I went back to the machines, and she did the same. This late in the week, we were pretty much the only ones in the gym. When it was about to close, we both left to the locker room to take a shower and change. But as I was washing myself from the sweat, someone came in the shower. Jane walked to me and immediately went on her knees.

"I-I knew it! It's the same smell!" She said, before going for my cock.

"Jane? What the fuck?" I shouted.

She was already sucking my cock like her life depended on it. I protested at first, but, she was good, and honestly, she was a beautiful woman. So, I let her do and despite my warning, she let me came in her mouth and swallowed everything. She then cleaned her mouth with her hand and smiled at me.

"Fuck, that tasted great!"

"Uh, are you ok?" I asked.

"Never felt better!"

She then left, and I thought, it was some fluke of life. But then she came back every day after my gym, sucking my cock dry. She even stopped exercising and stayed in the men locker's room sucking cocks. Her muscular body slowly disappeared as she dressed more and more feminine. Half a year after the first event, Jane was walking on all four, her mouth dripping cum and asking to get more from the guys there.

She got called the gym pet and brought a lot of new clients. Jane became a free use slut in the locker room, I have never seen the brand she drank the day she lost her mind. I guess, it wasn't good for consumption.