The baby's gummy Grin that Wouldn't quit

"I was holding a baby in some living room that wasn't quite mine, didn't know whose, didn't matter really, and it kept smiling up at me, this huge gummy grin that wouldn't quit. couldn't help smiling back, felt kind of helpless against it honestly. It grabbed my finger at some point, grip way stronger than it looked like it should be, and giggled over nothing, just my face maybe, and that giggle set something off in my chest, warm and full. kept bouncing it a little, not for any reason, just wanted to keep the laughing going. The room got brighter somehow the longer we sat there, sunlight that didn't seem to come from any actual window. baby's face changed a little each time I looked away and back, never bothered me, still smiling the whole time regardless. I didn't want to put it down, just stayed like that, rocking slightly. I woke up still smiling a bit, that light feeling sticking around a few minutes after my eyes opened."