Y & R: Victors suprise gift to Sabrina today...?

Ok so I watch everyday, and know that it hasn't been that long ago that Sabrina and Victor got together, and that Victor has had two vasectomies to not have anymore children.. But did anyone else catch when Victor gave Sabrina her earrings before the Gala that he stated they were December's birthstone, the month their baby is to be born? Now has this story line been going on since March, when technically she would have gotten preggo, or is this one of those examples of how people age rather quickly on this show???