My father was an active businessman when a road accident killed him. I knew that he and my mother had an active sexual life, but I did not know a small detail thereof -- or better, a couple of them which increased over the years.
Even though my father suffered of lactose intolerance, he loved sucking my mother's milk, and therefore my mother's breasts increased their size and sensitivity with time. Once my right elbow inadvertently rubbed her left nipple, as I was washing the dishes after dinner, and she shrieked of pleasure.
I was a good-mannered guy at the time, and did not do anything more to her; but our father was away, and I saw her blouse wet with a white stain. She unfastened it, so I could notice how big her breasts had become with time, she sprinkled it with water, doused some soap powder, and thoroughly rinsed it.
I could not help my leering at her cleavage; my mother noticed it and smiled, as if it was the compliment of a male who could never make her, and then hung the blouse up by the stove.
"Your bra needs washing too, mom," I blurted out; she looked at it, kept smiling, she put the tip of her forefinger on my nosetip, and went to her room to replace it.
Normal maternal behaviour with a grown-up male son, obviously. But after dishwashing, I went out with my fiancΓ© of the time, and she got more pleasure than ever, as I was obsessed with my mother's breasts that evening, my penis was harder, and I craved for more orgasms than ever.
When I came home, my elder sister Rina was still awake, studying medicine in the dining room -- it had the only table in our home which could carry all the books she needed. She was wearing a dressing gown with a wide neckline, and I noticed that she was wearing the same bra my mother was wearing before.
Rina felt my stare and asked me: "Joe, what's the matter with my breasts?"
"Are you wearing one of mom's bras'?" I asked, and she answered:
"Yes. We have the same size, so we swap bras from time to time."
That night I could not sleep evenly -- I could not help thinking about my mother and my sister going to a lingerie shop, choosing each other's bras, and getting so excited by looking and touching each other, that at home they could not help kissing, fondling, lovemaking.
It was an one night's folly, and my life resumed as usual the following day, until my father died. He apparently was the victim of his fetish -- while driving he vomited the milk he had just drunk from mom, inadvertently passed a red light, and a truck smashed his car.
Mom was desperate, as she felt she had killed him. Even my sister felt guilty, and I soon found why.
While I was completely unaware of my parents' fetish, my sister Rina knew that as soon as she turned 21. The birthday pie was sweeter than expected, and Rina knew why: mom had forced dad to abstain for a whole month, and patiently expressed and collected the milk whose cream had to be used for the pie.
When I got 21 too, I got a similar, but bigger pie, and now I know what had happened: after tasting her sweet birthday's pie, Rina convinced my mother to help her induce lactation.
As her hands could not express much milk from Rina, she had to suckle her nipples to improve her lactation. Soon Rina began getting excited as soon as mom leered at her breasts at suckling time, and she reaped several orgasms every day as she was milked.
I was studying abroad, so I could be kept unaware of all this; but dad soon crept into the picture.
A routine had developed: mom and Rina secluded themselves into my sister's room, while my father was having a shower, and probably thinking about what his wife and daughter were doing together; as soon as mom was done with Rina, she went into dad's bed -- and as they were both really excited by their thoughts and actions, they immediately made love.
After lovemaking, mom went back into Rina's room to suckle her again before bidding her good night. Dad noticed that it was unpractical, and proposed mom to invite Rina to their room. Dad swore never to have sex with my sister, and mom assented.
It was a really practical arrangement: as dad was now authorized to look at mom's suckling Rina, he could now suckle mom's breasts even when Rina was looking at them. My parents' bed was replaced with a larger model, in order to allow mom to sleep between her husband and her daughter, and give each what they needed most, alternately.
Home's atmosphere must have been torrid at the time, but both mom and Rina swear that dad never committed anything improper. When my 21st birthday neared, it was Rina who told my parents that I could not be served less well than she, and therefore mom and sis arranged everything again.
It was not so bad an arrangement for dad: these women knew that they expressed more milk when having an orgasm, so mom asked dad to make love with her every three hours, while Rina at first masturbated while mom was being penetrated by dad, and then mom decided to get her a dildo.
The ritual was so perfected: after dinner each of them -- dad, mom, Rina -- had a shower separately, then went to the parents' room wearing a dressing gown. Once they were there, they undressed, and dad begun hugging and kissing mom, while Rina was plugging mom's nipples and her own to a pump.
As soon as the cups were on, mom laid down, dad begun licking her vulva and sucking her clitoris, while Rina turned the pump on, and begun masturbating.
When the tanks were half full, dad rose from mom's vulva, handed the dildo to Rina, and both vulvae were penetrated together -- orgasms filled the tanks until overflow.
The milk was brought to the fridge, the pump was washed and rinsed, and all three got a nap until mom and Rina's breasts wanted to be expressed again.