Teasing my Sister In Law

First of all, I'll start by saying that all of it it's true and has happenned not long ago, that's why the story will take a little long to unfold. It's not like I'll start fucking my sister in law after a few beers or something. It takes a while, so be patient and take this note: whenever things happen "out of nowhere" it's because the story is fake as can be.

Now, to what happenned. I'm Tom, 28, married. Let's call my wife Sara, who's 27, and her sister, Becca, 23.

So, I started dating Sara when she was 20, so it means I watched Becca grow from a teenage girl to a beautiful woman. Their dynamic was always kind of puzzling to me. Sara is the the perfect kid, the oldest, the one that never lets their parents down and do everything as they say. Becca is the rebel one. She doesn't give a damn about what their parents - or anyone for all that matters - will think about her. I can also sense a bit of jealously towards her sister: maybe because everyone loves Sara or because she always looks very happy with me. It also doesn't help that we're doing good financially, so we can afford some luxuries like travels and nice restaurants, which I know means a lot to Becca.

Appeareance wise, Becca is a brunette hazel eyes, only 5'2''. She's also a very busty girl and she loves to show them around in low cut dresses whenever she goes out. I'll be honest, I never sensed any kind of attraction from her. She always treated me good, but never in a lustiful way. The only thing was the time she told me I was getting "muscular" from all the workouts and asked me to plan her workouts, but that doesn't even qualify as flirty.

But since she grew up to be very hot, I couldn't help myself but fantasizing with her. I know I'm wrong, maybe it's the forbidden fruit thing. Yet, I couldn't afford to make a move - not even the slightiest. Until the other day I figured out a way to tease her without getting caught. It could be pretty innocent and still, I could test the waters.

Me and Sara went to her parents home for lunch. It was a warm day, so I decided to wear my sweat shorts and a nice fitting shirt. Only I didn't put on any kind of underwear. I'm not THAT big down there, so it wouldn't be scandalous, but still it would be pretty noticeable if you even glanced at my crotch area. I wondered if I could catch Becca noticing it.

When we arrived there, I said hello to my father and mother in law and helped them out a by setting the table. Becca was upstairs in her room. Mother in law said she would go call her for us to eat. At this moment, I entered the bathroom and played just a little with my cock - enough to bomb some blood into it and make it more noticeable.

I walked out of the bathroom just in time to see Becca going down the stairs. From up there, she had a much better vision, there is no way she couldn't see it. I watched attentively her eyes meeting my eyes, she said "Hi there, Tom", and then her eyes went down to my crotch. She certainly noticed it. I may be crazy, but I really think I saw the tiniest little lip bite. Almost unnoticeable. Or maybe is something from my head.

All I know for sure is that after lunch, when we all got up from the table, her eyes went down there searching for it at least two more times. But I couldn't blame her, I glanced at her cleavage several times before, this doesn't mean anything on its own. It's not a sign she wants me to fuck her.