Establishing Limits

My younger sister and I have always had a good and loving relationship from what I can tell. Being only three years apart we've shared many thing at home besides our time, our room and sometimes our clothes. Still there are some limits to what we can share.

I have masturbated since a really young age, I believe since I was 13 or 14, still I've always have tried to keep it a secret from the family as much as I can. Reality is that when you're sharing a room with your sister and living in a pretty small house that's often really difficult. I might be guilty of masturbating quietly more than once in the cover of the night, in my room while I thought my sister was sleeping.

Usually I used a small Lovsense vibe an ex-boyfriend of mine bought me once, which takes me into some super satisfying orgasms while I control the vibration from my phone. It's not the most quiet thing in the word but it did the job. So it wasn't a big reveal either when I started hearing my sister trying to cover up her moans sometimes in the night. And for a while it was a hard thing for me to accept that my little sis was taking her first steps into the world of sexuality but I later reconciled with the idea, and simply ignored her moans whenever they made their appearance in our room, and why not? I made mine appear every now and then too.

But some limits were passed a few months ago when I started noticing my vibe missing from the drawer I usually hide it in during the morning only to find it later when I got home from college, in a very deplorable state (that meaning that someone had been using it). The culprit was obvious, and the first two times I noticed it I was certainly troubled, but too scared to ask my sister anything. After the third time I found it like that, my confusion was transformed into anger. I couldn't believe she was using something so intimate to me without my permission or any care whatsoever and not even bothering to talk to me about it. And I for sure wasn't looking forward to talking to her about how I had a vibe and I wanted her to keep her pussy away from it. So I decided myself I was gonna force her to talk to me and face me even if she didn't wanted to.

I've always had very messy and wet orgasms, not to the point of actual squirting, but just producing lots of juices and ending up with a very wet blanket or panties when I did it in bed. So I decided if she was willing to use my stuff for her own pleasure I was gonna use hers for mine. So I started masturbating whenever I could with her own panties. And after using them I would leave them in very obvious spots in the room so she could find them all wet and messy. And to tell you the truth every time I actually did it it was so exciting for me, I had never felt such a rush of adrenaline until then. Her panties were always a little too small for me but still managed to fit without problem, and just knowing that I was doing it in my sister's undies just for her to find them later in a very sorry state, just made me have the most exquisite orgasms ever.

By the fourth time I was using her undies I was terribly frustrated that my sister showed no remorse whatsoever and hadn't even raised the issue. So once on a Saturday after she had woken up and went for breakfast I went straight to her drawer and took a gray cotton pair that would look so lovely being drenched by my pussy. I slipped mine off and left them on the floor while I got my vibe from my drawer and slipped it right in while I put her panties on. I took my cellphone out and got the app for my vibrator on and just slowly ramped up the vibrator until I was in bliss. I was sure a big one was approaching. Having the room to myself was a privilege I almost never had, so I gave myself the little pleasure of ramping up the vibrations to maximum, they were certainly audible even though my vibe was buried deep inside me and covered by my sister's panties.

The orgasm rolled over me like a huge wave. And after I finished convulsing in bed I was left in a sorry state of sweat, gasping for air and with another girl's panties with a huge black spot, covered in my cream and juices. But I wasn't done yet, I was terribly frustrated and still really horny, so I took hers off and left them in her bed, in plain sight. Got myself dressed and waited for her to come back to the room.

When she came back the look on her face was priceless. I just stood there waiting  for her outburst and yeah it came. Sh was clearly frustrated that I had been using her stuff. We had our long awaited talk and I won't bore you with it. Just will tell you that things are much better now between us.