User blog comment:B214/Volume 22 spoilers/@comment-213.120.234.106-20160720102919/@comment-9595671-20160721044813

I think I recall something saying there were more kids than the 10 we saw in focus, Le Fay's son being one of them. I don't know how many, but I think I recall something saying he has about 20 kids maybe? (His parents are probably estatic over all their grandkids)

The other girls who have known crushes on him include Kiyome, Kunou, and Tsubasa. If Ophis ends up going past the friend stage, one of the kids could be Lilith via adoption since Ophis is kinda Lilith's mother.

That's still a lot of spots left though, so I expect in this arc we'll see some new girls fall for him or some of the current girls we've already seen will fall for him. Guess we'll have to wait and see.