My older sister, who has always been more overprotective than necessary, found out that I had a girlfriend. I thought she only saw me as her younger brother...but my jealous sister relentlessly attacked my nipples! ``If you have a sister, I'll make you realize that you don't need a girlfriend.'' The big-breasted sister, who has a possessive desire, has her nipples tormented and drained of her sperm! Before I knew it, I was being trained to be dependent on my older sister, who couldn't ejaculate without her older sister's nipples.