Is it normal that i like my girlfriends 'jelly belly'?

So my girlfriend is about 5'2" and she says she weighs 123 but I'm pretty sure she's gained a little and is at least 130 right now. She carries the most weight in her belly and a little in her hips. And the fat she gains is always very very soft. So her belly protrudes out even more than her boobs and it's very very soft but her skin is tight so it's all nice and round and smooth. And I love it, I can't stop touching or rubbing it or pinching it. Is it normal that I like this so much? And also would you consider her to be chubby or overweight?