I'm not exactly an old pro at this (my first season as well) but from my experience it LOOKS like she's probably still building. The same thing happened with my girl. She blew up, looked huge, I kept thinking "I bet this is it!" but I was reassured consistently that I would know. And trust me. You will know. Scale separation is a dead giveaway, and as fat as she looks right now unless it's a tiny ovulation you will have absolutely no doubt.
Hope this helps! Good luck!!
Edit: Looking at that second picture more closely it's pretty convincing. But I also found photos didn't do it justice for mine!