User blog comment:B214/Shin DxD 1 discussion/@comment-95.210.189.106-20180820141921/@comment-33341107-20180820180952

Well with Koneko and Kuroka their children will be siblings and cousins which sure is a little odd but nowhere near as odd as Issei being able to say to his and Yasaka's son hey I nailed your sister who is also the mother of your brother.