I got dry lips now of water?

Just a few days ago my lips were nice and hydrated, but today I drank around 3-4 bottles of water, and I realized that when I was done sipping, my lips were dry? Is that suppse to happen?.. because my little sister drinks a bit more than me and I realized her lips are soo dry after she sips. Right now, my lips feel like a dry layer skin over my lips.. what should I do? I just tried lip balm but didn't do anything :(