My older sister, who is 34 years old, recently had her first baby. The other day, I was doing an errand in her neighborhood and stopped by to visit. She happened to be alone with just the baby. My sister is very laid-back and quite liberal. So, when the baby started to cry while we were talking in her living room, she didn't hesitate and began to breastfeed the baby in front of me while we talked.

Eventually, the baby drifted off to sleep and my sister pulled down her shirt. As we continued to talk, I started to notice a wet spot spreading on her shirt where her nipples were. She seemed totally unaware she was leaking, so I mentioned it to her. She goes, "oh damn, I've still got a lot of milk left," and pulled off her shirt and asked me to grab a towel.

My sister is now completely bare-breasted, lactating milk right in front of me. I had never seen this before and was intrigued by how a fine spray of milk just naturally came out of her breast. She could see I was interested, so she squeezed her breast and the milk flew out in different directions. I said to her, she needed another mouth to drink all the extra breast milk.

Her response was, "help me out here, Bobby. My boobs are aching and I don't want to wake up the baby to feed some more." I was kind of flabbergasted, but I knelt down in front of her and started to suck. I nursed the milk out of her breasts for several minutes.

When she said I had done enough, I stood up and had a big bulge in my pants, which she noticed. She started laughing and said, "shit, that made you horny!" I was blushing beet red and tried to act like it was nothing. But ever since that experience, I've masturbated several times thinking about it. I am so tempted to ask my sister if I can do it again. I know she will tell me to piss off, but I can't stop wanting to do it again.