Fiance’s Sister!

This story begins with me, of course. I’m 22 and currently engaged to a beautiful girl of the same age. We have been going out for almost 3 years now and i have been welcomed into her family with open arms. I even lived with them for some 8 months. My fiance has 2 younger sisters, one is 16, Kaitlyn, with large tits for her age and a decent ass as well. But this story doesn’t involve her, although sometimes i think about it. This involves her youngest sister, Cassie, who is 14 and is quickly growing into her amazing body. She does gymnastics, so she is super fit and flexible and she has nice sized tits coming through as well. Just about a handful now, just perfect in my eyes.

This story happens a few months after me and my fiance have moved out and into our own home. Things have been going pretty well, we’ve settled into our new home, have sex pretty much in every single room in the house, over and over again. We have dinner at my parents and then her parents at least once a week. In this time I have gotten closer with the sisters, more as a brotherly figure i thought. I recently quit my job and have been job hunting for sometime, so I have mainly been sitting around the house doing nothing. It is also school holidays, so her sisters have been home.

I have been noticing Cassie filling into her amazingly sexy body and have even found myself fantasizing about her while having sex with my fiance, they have similar body features. What i haven’t noticed, is that Cassie has been sneaking looks at me as well. One day, again i was at home alone, Fiance was at work all day, and Kaitlyn was at her holiday job. I was just planning to sit around, keeping out of the heat, but received a phone call from Cassie.

Me: Hello Cas, whats up?
Cassie: Hey Tim, are you busy today?
Me: No, why?
Cassie: Can you maybe come over, I don’t really want to be home alone right now.
Me: Ummm, i guess i can, is there anything wrong?
Cassie: Not really, i just don’t feel right being home alone right now.
Me: Yeah OK, I’ll be there within the hour then Cas.
Cassie: Awesome, see you then.

And she hang up. My mind was racing a little, i knew she would most probably jump in the pool, which meant o got to see her in a bikini, that would send Tim Jr. firing. I quickly had a shower and got my board shorts on and a shirt, i knew i would be jumping in the pool. I quickly raced over there, they only lived 10 minutes away. I entered the house and i could here her already splashing the pool.