Your transformation

You felt your body changing. First gills opened in your neck. You had noticed these on your mother and paid no attention to them until now. Next, just after your cock, you felt your legs begin to fuse. Mum moved her tail out the way as your legs transformed into a long tail with turquoise scales. “I’m going to cum” You found yourself able to speak underwater.

“Mmm Yes baby cum for mummy.” She replied

“AAAAAa” You cried as you shot your load deep inside your mother at the same time your fluke busted out from the end of your tail and slapped into hers.

“OH ah mmm” You mum moaned as you felt her vaginal muscles squeeze your cock tight. “Oh wow, nice scale. Ever since I heard about your dive I knew you had the mer gene in you. For half-mer it your tail normally only comes out in times of water-related stress. You must have been very nervous on your first dive and with the added pleasure, you were able to break through.”

“So was this all a ruse to see if I had a mer gene? You asked as you tried to adjust to your new body. Rolling around in the now half-empty bath.

“No, no, baby.” I really couldn’t resist the saltwater or your impressive cock. Everything I said was true but once you started to fuck me I seized the opportunity.” Mum explained.

“Well then can you at least tell me how to change back.” You asked.

“Oh, that will happen naturally once you are dry.” I suggest we actually clean up and get out. Oh my we did spill a lot. Once we have legs back, we can talk more about merfolk. I am sure you have a lot of questions.” She explained, “Also, I wouldn’t mind another go with that in human form.” And she points at your softening dick.