Pasaron cosas con mi hermana adoptiva (parte 2)

The other day we left as always and Agos told me she was going to change while getting into the backseat, that she could do it because she was so girlie, and in a cheeky way told me not to look. I said relax, little sister. Agos started taking out clothes from her backpack and to my surprise she took out all her clothes leaving herself completely naked. I tried to look at her through the rearview mirror but couldn't see much, just a flash of her tits. When she crossed back over in front of me she put her whole bum in my face and I could see that she had put on dental floss, it was like Verla so slutty, it made me stop my cock and ask where she got that clothes Agos: brother, I have a lot of clothes you don't know. She said it in such a provocative way that more turned me on. When I left her at the school gate, she gave me a kiss but it wasn't like usual this time, she kneeled down on her seat and the kiss was on the corner of my lips while her hand was just centimeters from my cock which was fully erect. I looked at her bum and you could see the thong string, I told her to pull up her leggings because you can see the string Agos: oh yeah like your brother takes care of his sister and she gave me another kiss as I was leaving, while walking away, a few meters ahead her friends appeared and she was in full slut mode from the door she said bye my love loud enough for her friends to hear and went off to meet them. I was fully hot, so I did a couple of blocks and had to stop to give myself a wank thinking about the girl who used to be my sister until two days ago when I saw her as innocent and now she's turned into a little devil. The wank didn't last more than 2 minutes and ended in a cum, luckily it didn't stain my clothes but if not for the upholstery and the passenger seat. Since I was running late for class I didn't take the time to clean up and when I left class I completely forgot that the car was dirty with my cum. In the afternoon I went out to look to Agos, but this time I stayed inside the car, I didn't want to repeat yesterday's episode. When I see Agos leaving with her friends, the four of them in slut mode, showing their bellies and a little bit of thong string, all the dudes and even some parents would turn around to look at them and say things, but they wouldn't get upset, they'd just get more slutty and provocative. The one who seemed to be the leader and most slutty of the four was the mica, it was clear she was a real villera, she'd take charge of answering back to the dudes when they yelled at her. When I saw them coming towards me from the corner, Agos said goodbye to her friends and got into the car, Mica took advantage of having the window down and came over: hi handsome, what's up? Are you angry or do you have a hard-on and can't get out? I was surprised by her question, all I could respond with was: hi, no, I just arrived and didn't have time to get out. The truth is that seeing them had really gotten my cock hard. Agos got in and gave me a kiss on the cheek as usual, but Mica saw that and said: what's up? Are they fighting or is it a lie that they're boyfriends? I looked at Agos like we didn't know what to do. And Mica added: it seems like Agos is lying and they're not boyfriends, and she started laughing. I didn't want to leave my sister in a bad spot, so I responded: we don't like kissing in public Mica: bueee they're big liars you guys. I grabbed Agos' face and gave her a gentle peck, thinking that would be enough to shut Mica up, but it wasn't. Mica: but if they have a boyfriend, they should get busy. I hesitated for a moment, but the truth is that the situation had already gotten me pretty hot and I had a hard-on, so I looked at Agos and she was beautiful, I grabbed her face with my two hands and we started kissing passionately. Agos seemed to have experience, even more than me, and was sending tongue all over the place, I forgot that her friends were watching until I heard them laughing. And I'm like saying: uff kids of whores are getting me hot Yo, coming back to myself and seeing Mica's eyes, I ask her: satisfied? Mica: reee, yeah they're gonna get what they should take jjajajj I stayed quiet and already had the urge to leave there, so I started the car with the intention of leaving. Mica: eeyy are you taking us? Yo: another day, today I'm in a hurry Mica: uhh well, they're definitely gonna get it, and she laughs, directing herself at Agos, friend, leave your boyfriend alone for me, and she laughs out loud. We said our goodbyes and started the trip to my house