Is that his sister?

Josh paused as he examined one of the pictures, that looked like it was taken in his kitchen. That couldn't be possible though, right? For that to be the case these pictures would have to be of...

He scrolled up, ignoring the flood of images of his mother and this mystery woman in various states of undress until he found an image that included her face. As soon as he did he realised his suspicions were correct, clearly the incestuous apple doesn't fall far from the tree. His mother had been sexting, and arranged a date with, one of his sisters!