I just received an e-mail from a reader who told me that I had made a mistake. So, I fixed it and I have uploaded a revision of the chapter, and it will be up soon.
I didn't know there was a difference between cousins and nephews. In the Dutch language, we only have one word for both, so I made the wrong assumption.
For my story, I did mean cousins, because they are the kids of Sandra's aunt. As you can guess, I didn't know that nephews is used for the kids of a sibling.
I apologize if this confused any of you. As you know, Sandra is an only child, so it would be very difficult to be a nephew of Sandra. ;)