So I just had my girl out. And she "yawned" 3 times in less than 30 seconds. The first time I saw some red liquid at the back of the mouth. Second time, there was still some and she kept her mouth a little open after the yawn (just very little open, like extremely little). The third time there was no more red liquid. After that everything seemed normal, and she didn't yawn again. The liquid didn't come out of her mouth, I guess she swallowed it?
What was it? Why? And how?