14kg doesn't sound excessive to me.

Mind you, it is important to be careful about what you eat, without obsessing about whether your body will change too much or not. Obesity is a risk factor for many conditions in pregnancy and labour, and so while you should eat to your hunger, as someone said upthread, make sure you're doing it with nutritious foods and not indulging the naughtier cravings *too* much

With my first pregnancy I lost tons of weight in the first half of the pregnancy due to severe nausea, and was 48kg by sixteen weeks. Then, at about twenty weeks, when i started to feel better, I made up for lost time and just about ate our whole apartment. I was nearly 90kg by the end of the pregnancy.

I'm doing much better this pregnancy with a low GI diet to keep my blood sugar under control, and while I put on 10kg by 27 weeks, the gain has slowed down a bit now. I'm looking forward to feeling fitter when this baby is born than before, hopefully! I do carry a lot of fluid, though, regardless of what I'm eating, and that's always going to show up on the scales, especially in the heat!