Is Jude and Davis,Twins in real lives?

I was watching the first episode of this season commentary on cwtv.com. You should check it out it's interesting and Mark was saying that I think there was a set of twins once, but for the most part they changed the mga sanggol quite a bit because of how fussy they would get sometimes. Even sometimes it was a fake doll. So what I'm getting out is there were several mga sanggol that have played Jude and Davis. There might have been twins at some point it's hard to tell. :)