Yeah, give them a couple weeks off this time. It's still early in the season---once you start feeling golf balls inside your female, THEN you want to get more aggressive about frequent pairing. He should show a lot of interest then, too, because he can tell she's getting ready to ovulate.
Like Domepiece said, ovulation isn't a sudden thing. She'll get brighter and brighter and you'll start to see a bulge. And the follicles will get very obvious. The period of time when she's really hard and swollen and miserable is only a few hours long, but she'll be swelling and glowing for days before and after.
She'll also shift from cold-seaking behavior to heat-seaking around ovulation.
As long as you mark down your best guess for the ovulation, you should have a pretty good estimate for when she's going to lay. Most females are pretty good about the pre-lay sheds. And even if she fakes you out the way Lois does to me every time, you still won't be off my more than a week. Just keep the incubator warm and check on her every day or so, and it'll be okay.