My cousins came to stay, and my sister and cousin's brother witnessed their sex in the bathroom early in the morning. Of course, they were both excited. The two of them were left alone, and my cousin invited me to take a bath together for the first time in a while, and I was found to be erect. "I'm an adult now, so I can take it so deep," she said, and the blowjob felt so good. "Do you want to do something you couldn't do when you were a kid?" she asked, turning her back to me, so I inserted it all the way in.