Second pregnancy and no GD

Had it my first pregnancy, although never had to take insulin and just monitored BG with a meter. Currently pregnant with my second, and they had me take the 1 hour GTT at 16 weeks. I passed it with flying colors - 96. I have pretty much the same eating habits as I did first pregnancy, but I’m not exercising/going to the gym nearly as much this time around. I also never lost all the weight from my first pregnancy and started this one much heavier. So I’m surprised I passed. Anyone else experience this?