Parent threesom

Your Dad was very encouraging of you and your mother. One evening he knocked on your door.

"Yes." You replied and went to open the door.

"Son, I know with your sister back and the lockdown continuing it has been hard for you and your mother to get some private time. She really wants this baby and tonight she is in the middle of her cycle." He explained.

"Ew, dad too much." You protested in disgust.

"Sorry, I thought you were used to this whole **** thing. " Your Dad replied.

"Yes, but knowing where my mum is on her cycle is too much information." You explained.

"Oh, sorry, anyway Now is your best chance, sneak over at midnight and you will find our door unlocked." You dad instructed.

Midnight came and you were ready. You tried your best to sneak past your sister's room but there was a creaky floorboard

Eeekk

The board creaked. You hesitated but heard nothing from your sister's room. Moving on you reached your parents' room and opened the door. Lit by the bedside lamps your mother lay in bed fully naked, your father laying between her legs eating her pussy. His face lifted and he whispered. "Just getting her warmed up for you." as if she was a motorbike or something. He went and sat on a chair by the bed in the shadows of the lamps. You stripped fully naked, your cock springing free of your boxers. You had looked at your favourite pornographic mermaid photomanips just before this to get ready. You realised that one was not manipulated at all and was, in fact, a real mermaid in a bath.

"Someone's ready." Your mum whispered.

You crawled into bed and kissed your mum on the lips. Not wanting to waste time and risk being discovered you then thrust your hips and penetrated your mother's moist pussy.

"Muuumph" You mum moaned a bit too loud. She then gripped your dad's pillow and stuffed it in her mouth.

Out the corner of your eye, you could see your dad naked and masturbating but you ignored it. There was no sexy teasing and very little moaning as the bed squeaked a little as you fucked your mother.

As you both built close to orgasm your mothers muffled moans built. She took the pillow away and whispered. "Honey, I need your help."

Your dad crawled over and your mother whispered in his ear. You focused on your mother's beautiful breasts to avoid looking at your farther as you thrust into your mother. You were then **** to look lower as your view was obscured by your dad's ass. He squatted over your mum and she began to suck his cock. distracting her from the pleasure you were giving her and filling her mouth. You focused on her pussy and in your mind thought of mermaids. You felt your mother's body clench your cock and you came together.

Your farther came in your mother's mouth shortly after then flopped onto his side of the bed. "Good job, son." He congratulated me in a hushed tone. I slipped into the bathroom to clean up then got dressed and sneaked back to bed. I slept well and dreamed of my mother in the bath, her mermaid form bulging with a baby bump.

You managed to get away with this each night for the rest of the week. This was also where you got control of your transformation. With April ending and May beginning your mum had to go the pharmacy to pick up your brother's medication. While she was there she picked up something else. The test came back positive, she was pregnant. You were going to be a farther.

Once this news was revealed to you, your dad no longer thought it appropriate for you to fuck your mother in her human form. It was getting risky as you had sworn that you had heard movement outside the door once or twice. He did, however, let you keep having sex with her as a mermaid. One thing he had found out early in their relationship; while pregnant with you; pregnant mermaids crave attention from mermen. She had had many visits with her brother all the times she had been pregnant in the past. With lockdown that was not possible. Your half-mer cock would have to do.