User blog comment:B214/Volume 21 info & spoilers/@comment-174.50.251.186-20160414221004/@comment-9595671-20160919015759

Considering he's become a high class devil now, and that Ex has shown he's got more children than currently girls in his harem (if he only had one kid with each, which is likely since getting twins is already rare), I think the last arc is gonna have that as a minor focus.