My brother is not popular with girls and stays in his room all day masturbating. Finally, he started masturbating in my underwear. No matter how much I tell him to, he won't stop. Meanwhile, my boyfriend wants to have sex somewhere different, so he comes over to my house while my brother is out. Being in a different place than usual, and at my house, I get even more excited. My boyfriend also brought lots of toys, and it's more intense than usual. I end up cumming again and again. Then, I look over and see my brother peeking in and stroking his thing. Surprised, my boyfriend goes home. Brother...why are you doing that...?