User blog comment:B214/High School DxD EX/@comment-25262334-20150826221408/@comment-3965848-20150826224534

Well then it's official, the cat sisters have kids with the same person which makes them not only cousin but also siblings, always though that kind of thing was a bit weird and a little incest but hey their devils so who really cares.

Although it makes me wonder if in the underworld, a certain degree of incest is allowed.