I was in the mood to masturbate one morning, like I always am, but it was getting kind of late so I decided to take my vibrator into the shower with me. I didn't get very far into it when my younger sister came into the bathroom and said she needed to get ready fast. We both know each other masturbates and don't really try to hide it, so even though the glass is partly see-through, I kept on going. It was silent at first, but I asked her about her school which started a conversation while I was doing it.
After she brushed her teeth, she sat down on the toilet next to the shower and started cutting her toenails. She bought a pair of sandals the day before and wanted to look nice, and that started another conversation about shoes. We were about halfway through that when I told her to hold on. She asked me if I was about to cum and I told her I was really close, so she left me to it. After a couple of grunts and a moan, she asked me how it was. I said that it felt really good, and we went back to our conversation. I soaped up quickly and got rinsed off, got out and dried myself off and threw on my clothes while we kept on talking, then parted ways when she went to school and I went to work.
It's fun having an open family sometimes.