Made My Sister's Bf Cry

This happened when I was 18. My sister was 15 and she was going out with a 17 year old guy. He was a decent looking guy, dark skin, short hair, and built like a stick. Nothing special. My sister and I are tall, slim and have brown hair and freckles.

We were raised by a single mom and she started working on her new career after me and my sister were old enough to look at after ourselves. She used to work very late on weekends and it's just me and my sister at home. And sometimes her new bf. Even though I didn't like his attitude sometimes I never interfered in my sister's relationship. Mom had gave us "the talk" as soon as we hit puberty so I'm sure my sister was aware of the risks. I wasn't sure if they were having sex or not but I knew they were doing the oral stuff everytime her bf came over.

One weekend, as usual he came over but my sister wasn't back from her dance class. He asked me if he could stay until she's back and I let him in. We didn't really had anything to talk about so I told him to watch tv as I wanted to get ready to go out as soon as my sister came back. So I went to the bathroom. About 5 minutes later as I was finishing my makeup he barged in without knocking. And he was fully naked. He was covering his private parts with his hands. He wasn't covering much as I could still see some of hanging bits. He walked inside and closed the door behind him. I asked him why is he walking around naked in our house. He gave a very cocky smile and said that he has "pretty big" reason to feel confident about his body. And with that he removed his hands completely from his private parts. I turned towards him looking him up and down. His skinny body, dark black skin, a cocky smile and his half hard dick hanging down. And he was right. He was really big down there

Now don't get me wrong, I have had my share of different sizes and I like them all but there are 2 types of guys I just can't stand. First the below average guys who are neck deep into self pity and the second is guys who brag about their size as if it's the most important thing about them. As I've said I didn't like my sister's bf's attitude because I had caught him few times openly staring at my breasts and ass and made few inappropriate comments. And now he was standing in my bathroom infront of me completely naked bragging about his giant dick.

Apparently he took my momentary silence for a shock because he walked closer to me with that same annoying smile. We were about the same height and he was standing so close that my hand was only few inches away from his hanging dick. I asked him flatly what he wanted. He said that there's so much he wanted but my sister was not ready to give him yet so he came to ask me if I could give him since I've more experience. And just to clarify what he meant, he made a thrusting motion with his hips which made his dick swing and hit my hand few times. I knew exactly how to handle clowns like him so I decided to play along with his schtick. I decided to stroke his ego by complimenting his size. I whispered in my sweetest voice that I'd love to and I always suspected that he was hiding a giant snake in his pants. His smile got bigger and he put my hand on his hard dick. He was very thick as well and I could feel his veins with my fingers. If he wasn't such an asshole and dating my sister, I'd have love to try him out few times. But unfortunately he was a jerk trying to fuck his gf's sister. He leaned in for a kiss but I instead pushed his face into my neck and let him nibble there. I was still holding his dick with my fingers. As if to prove that he is an asshole he asked me to convince my sister to let him fuck her so he could do both of us together someday. I'd had heard enough and decided to teach him a painful lesson. I pulled down his dick really hard making him jump but I didn't let go. Instead I grabbed his balls with my other hand and squeezed them hard like squishing slime. He could barely stand straight and tried to pull away but I hold him firm and told him what a piece of shit he was. He was tearing up little bit so I loosen my grip and told him to leave my house and never come back. I took pics of him as a backup. He slowly stood up and turned to leave. He was muttering something and I heard the word bitch, so I again grabbed his balls this time from behind. He yelled sorry and begged me to let go. I took few more pics of him and pushed him out. He left as quickly as he could. Half an hour later my sister came back and I told her everything that happened showed her the pics. She told me that she was looking for an excuse to break up with his as he kept pressuring her for sex. She blocked his contact everywhere and then we ordered some pizza and watched Netflix.