I push down her shorts and underwear, discarding them to the side as I pull out my cock. Her vagina glistens in the light, as do the slight shine of scattered scales. Her eyes grow wide but before any protest I push my dick into her' meeting her eyes as I do.
"Jake, we are committing a terrible act, oh stop please" mom suddenly arcs in pleasure and moans deeply.
I respond by trusting in harder.
"Please we cannot"
Another thrust
"Please no"
2 more, deeper each time
Mom screamed " Oh Yes, I need more!" As I pumped harder and harder.
"Look mother at your legs, see them go!"
As we looked down slowly spreading from her pussy was a growth of scales, which grew down her legs with every thrust.
"Oh god it feels so gooood" shouted mom.
"Make me a mermaid, make me one master!!"
I increased my frantic pace, noticing the repositioning of her clit. I held her up as her legs fused together as it made it to her feet.
"Soon it will happen, you will be forever mine, CUM For me Lauren!" I screamed as I quickened my pace.
"No, I don't want to be a mermaid, I don't want to lose my human, uhh, AHHHHHHH!!"
I came in her, and my seed smashed into orgasm, destroying her humanity.
As she orgasmed her feet flattened out in to a fluke, and her humanity was forever gone