One day later, Brad began to give birth. No one knew how it was possible but Mary watched Brad as his anus stretched to the size of a birthing tunnel and soon she could see their child's head.
"Oh the baby's coming!"
" Yeah..." *pant* " I know, Mary! Why and..." *groan* "how did you do this to me?!"
"Shut up and push, Brad!"
Brad pushed for all he was worth and with a cry, out came a beautiful baby boy! Mary cleaned him off and adored her new child with a precious only a parent would understand.
"Oh, no!" Brad cried, "there's more!"
Sure enough an hour later the two were holding the bouncing babies. One boy and two girls.
"They're beautiful, Brad!"
"Next time you be the pregnant one.!"
Mary smiled at him as she took turns breast feeding each child. They were a handful and Brad and Mary were very preoccupied having an immediate family of 5. But then weird things started to happen.
The children grew extraordinarily fast. Within a week they were all teenagers and starting puberty. The girls grew nice round big breasts. They were identical twins down to their toes. They never had clothes on because they grew too fast and ripped out of them. Their nipples were little penises that matured into 6 inch cocks on their DD breasts. They both had golden brown hair like their mother. Even at this age they still drank from their mother's nipples.
Mary found out that drinking water helped keep her breasts fuller to provide for her children. But more experimenting went on as they went from day to day. Mary was having some more chocolate one day. Her breasts expanded to K cups and grew to a chocolatey brown. Brad gave them a try and sucked on her new milk. He drank her tits dry when he started to change. His skin darkened to that sexy chocolate brown. His cock grew to a wonderful 10 inches with balls to match.
Mary grew very wet from the sight and couldn't help but taste his new cock. He even had muscles that looked chiseled from stone. With his strong hands he pulled her hair back and forth, sliding her mouth over his large new member. He came deep down her throat as Mary moaned around his dick. She drank him up.
Her tits exploded out of her chest to S cups and dark penises grew out of her nipples again. Both were matching 10 inch cocks similar to Brad's. Mary moaned with delight from all the sensations.
The two sisters came in ready to be fed and they saw the glorious feast to be had on their mother's chest. They each wrapped their mouths around a chocolate cock and sucked for what it was worth. Mary orgasmed about three times before she was drained and she watched as each of her two daughters had expanding breasts. Four breasts the size of watermelons and their nipple dicks grew to two feet long!
The two girls screamed with joy as they began touching each other. Stroking the other's cocks. One began sucking on one cock and her sister was giving her a handjob. They each came together but their beats were still very full.
Before long the two girls had each other's dicks inside their virgin vaginas. They were fucking so hard into each other as their breasts jiggled and their hair shook back and forth in perfect rhythm. It didn't take long before they were each cumming hot loads of their fathers double fertilized sperm deep inside one another.
What the didn't notice was their brother was watching. He was stroking his own decent cock as he enjoyed the show of his sisters. They didn't want him to miss out having at least one more load in their breasts. They tracked him with giggles from their throats and began kissing him all over. Soon enough one sister has both her nipple penises in his ass and the other sister had her's down his throat while she helped him out and sucked his cock off as they penetrated him to bursting. They had him hovering over the floor, and rocking back and forth with much force. And they had one purpose, to feed and fill him up. And as they all hit climax at the same moment their brother was pumped full of their father's seed.