User blog comment:B214/Question and Answers 6/@comment-26293136-20170105123715/@comment-9595671-20170111155338

But he also said we shouldn't expect anything from him with Kiyome, so she's probably out of the picture.

We also know he's got atleast 20 kids in the future, but we don't know if he had more than one kid with any of his wives yet, though it's implied Kunou's one of them. Especially since she moved into Issei's house.