Jack’s childhood was pretty ugly. He had two younger sisters. He had to spend most of his time taking care of them.

His father was dead and his mother worked six days a week to support them. They only saw her for breakfast and dinner and that was it. The rest of the time, Jack had to be the parent. The older sister was little more than a mobile vegetable.

On the bright side, he had two lovely sisters. He had plenty of time to do what he wanted. He made good use of his advantages. Gina was the older of the two and was just well developed. She was a pretty, well-built girl. Bridget was also pretty and had just started developing. She was also a selfish idiot and wasn’t that bright either.

It was with Gina that Jack began his abuse. It was a night when Bridget had gone to a party and Jack felt sorry for her. At that moment, he noticed that at sixteen his sister’s body had very nice curves. For the first time in his life, he realized his sister was more than just a pain in the ass. One night she started talking about sex, asking her big brother about it. Jack sniffed out the opportunity and soon had plans to introduce his sister to sex.

It took a week before he managed to get condoms, but once he got them, she got fucked for the first time in her life. What surprised him even more was that Gina seemed to like it too.

From then on, he had the green light to fuck her several times a week. He also learned to eat her pussy, which she enjoyed. However, she hadn’t figured out how to suck him and she was giving him teeth marks to prove it. A side effect that was noticed though, Gina learned to finger herself for fun and was likely to do so at any time.

Bridget didn’t know what her siblings were doing, but one day she had to answer her own question. Jack had seen her experiment with self-pleasure and had decided that she should please him instead. It started with a simple blackmail so that she lets herself be touched by her despicable brother.

Bridget was soon sucking Jack whenever he wanted. She hated the taste but she knew she had no choice. From sucking they moved on to other things and before long she had lost her cherry and was taking it up her ass. Neither of them wanted her to get pregnant so the subsequent penetrations were always through the ass.

For the next three years, Jack had all the sex he could handle. But all good things must end. He joined the Navy when Bridget turned eighteen and once he left the house, Bridget told her mother everything. Needless to say the shit hit the fan. Nothing was ever the same again.