Ever since we were young, my older sister & I have always had a great relationship. We're only a year apart so we have some of the same friends & travel in the same circle. Jen is about 5'8, 130lbs, blonde hair & green eyes. She's a beautiful 36D, thin waist & nice, tight ass....the kind that has the guys in school drooling over! As I said, we're very close and we tell each other everything. I tell her about fucking her cheerleader friends & she tells me about blowing guys from the baseball team. Basically, nothing is too taboo for us to talk about.
This year, I graduated from high school & was heading off to college. Our family has a cabin on a lake, about an hour from where we live. My parents decided that we should head up there for a couple of weeks, before I shipped out to school. My sister & I weren't too thrilled, seeing how the cabin has no TV, no video games...basically, none of the creature comforts of home. My parents agreed to take two cars up because since we were close to home, they would take the first week off & commute from the cabin to work the second week.
My sister rode up with me & within 20 minutes, fell asleep. She was wearing short shorts & a tight, white tank top. As I said before, she has big tits & I started to find myself staring at them. As I was coping a glance, I hit a pot hole & watched as her tits rippled so beautifully. My cock twitched in my shorts. I was soon searching the road for more holes & aimed the car right at them. I started getting hard as I watched her luscious tits bouncing up & down. Unfortunately, it was short lived as we reached the cabin. After helping mom& dad open up the cabin, we decided to take a swim in the lake. My chin dropped as I watched my sister walk out in a virtually non-existent bikini. I was amazed again, as I watched my mom walk out right behind her, in an equally stunning bikini. After hearing mom& dad fuck a lot of the time, I figured out why. She was a hottie!
The week went by relatively quickly & it was time for mom & dad to return to work. The day they left, my sister & I decided to take our boat to a nearby island & go exploring. We packed a lunch & our things & headed out. After rowing & paddling for a while, we reached our destination. We got out & pulled the boat ashore. We decided to get a little sun & rest before we set off on our little expedition. I stripped off my shirt & stood there getting the bags out of the boat. As I turned around, I almost dropped the bag as I saw my sister disrobing. Her bikini was smaller than the one I saw before & it was snow white!! My cock twitched as I could see the faint outline of her nipples. she noticed my reaction & said "I'm only wearing this so I can get a better tan!"