I was getting out of the navy and invited my girlfriend Robbie to join me on a vacation to flordia for a week in Disney World followed by a week on a Caribbean Cruise...

She said yes but her parents we against it, being just the 2 of us alone!! They suggested that her younger sister Susan tag along to keep us from getting into trouble the thought was Susan was more level headed... I agreed and after my discharge, the gals flew down to Orlando Fl. We were staying in the park for the first week!! There was a of sexual tension on Monday & Tuesday as Robbie & I could not find a time or place to just fool around together without Susan being there..

Late night on Tuesday I had a raging hard on & I slipped off my shorts and rubbed it against Robbies butt... She responded by stroking me for a bit, then to my surprise she started sucking me off... Robbie had never given head to me in the past, but I knew in an instant she had been practicing on some lucky guy back home... Her timing of stroking my shaft and sucking on the head of my throbbing cock was outstanding..

After quite a while I lost control and shot a huge pent up load into her mouth.. She gagged, swallowed some, while most leaked down her cheeks... She spit that out into a pillow...looked at me, and said THAT HAS NEVER HAPPENED BEFORE.... I suppose she forgot I had never had a blowjob from her ever... Meaning other guys did not cum in her mouth!!! Now I knew she had been cheating while I was station 500 miles away from her...... She went to the bathroom to wash up, & her sister Susan looked over at me and acknowledged that she was awake the whole time, & stated that it was like watching live porn...

While the vacation continued younger sister Susan kept making suggestive remarks that she was impressed with my length & girth, and that she found me sexy as fuck & she wanted some of that action sometime in the future.....

When we went to bed on Thursday my girl whispered in my ear she wanted me so badly her pussy was dripping wet...So when her sister took a shower we started fucking like long over due lovers....We were fucking doggie style which Robbie just loves and said that we fit like a lock and key in that position... We were so carried a way that we never knew the shower shut off until Susan caught us... Robbie was embarrassed but we continued.... I was aware that Susan was fingering her pussy while watching us...

When we finished, I went to take my shower first while the girls chatted... As I toweled off Robbie took her shower and I talked to Susan.. She admitted that she was still very much a virgin, but was constantly horny, and that she masturbated daily, but that she had not found a guy she trusted.... Then she asked to see my cock.... well the shower was still running for Robbie, and I was like o.k. here you go...

I dropped my towel stood before Susan and she asked if she could touch me anywhere and everywhere... I let her have her way, she ran her hands over my chest, down across my hips and abbs, then one hand on my semi hard cock and her other hand on my balls.... She said she was scared, but ready...just then the shower shut off... I slipped on shorts and a t-shirt!! Robbie exited the bathroom in a very sheer naughty babydoll .... Susan remarked that it looked like Robbie wanted more from Jake!! Robbie said she missed the way I fulfilled her every naughty desire.

We 3 fell asleep, but around 1a.m. I was rock hard and Robbie was next to me, I did not do much kissing or petting, I slid her silk panties aside and put the head of my hard cock at her entrance and slid it with little or not problem... Our fucking awoke Susan once again she was taking care of her pussy while watching her older sister getting her brains fucked out....

This continued for the rest of the week, until we left for our Caribbean Cruise...