My best friend Dan, who I have known since we were five has a nudist family. It's just him and his parents, and they are always naked at home. I have been to their place since I was five, and never thought it was that big of a deal, until we started going into puberty. His house is larger and funnier than mine, so I'm there almost every weekend. On sunny mornings, Dan, his parents, and I always go to their pool on the backyard, completely nude.
One day, something new to me happened, but apparently it was more than a routine. His mom laid down on the stretcher to sunbathe, and was spreading some lotion all over herself, and then called Dan over, and asked him to put lotion on her breasts. I was stunned! Dan then stood with one leg on each side of the stretcher right above his mom and began spreading lotion on her huge boobs!! I saw she was smiling, and Dan's dick got hard. She then said: 'Ooooh, already hard, are we?' As I kept seeing that, I also grew hard. As Dan was finishing her boobs, they saw that I was staring, and had a boner. She then said: 'You can come here too Bobby, you can never have too much lotion, can you?' I still didn't move. She then motioned her hand in a gesture calling me close. I then went, and stood the same way Dan had, and began spreading lotion on the most awesome pair of boobs ever! My dick got even harder, and his mom then said: 'Hey, you're also pretty stiff aren't you? Why don't you two have that resolved?'
Dan then jumped in the pool as he called me over. As we were talking, I asked him how long he has been doing that, and he said for the past year or so every other weekend. I still couldn't believe it. He then said, 'Let's jerk off by the pool.' I asked about his mom, and he said she even encourages him to. So we got out, sat on the floor by the pool and went at it. We have masturbated together since we're 11, so it's no big deal anymore for us. After a while, we lay down on the warm floor looking at the bright sky as we both came all over ourselves, obviously thinking about his mom's huge boobs.
More happened later on during that weekend, involving his mom. I'll right about it later.