The calm in Heidi's voice wasn't surprising. She could evoke that sense of calm in a multitude of situations, many of which would have others frenzied with panic. First hearing the call, Peter was on his feet, ready to jump in and respond, but the momentary delay offered him a chance to hear the floppy-hair comment. Lips curled into a smirk, he chuckled to himself and teleported to his room.
Pajamas were somewhat difficult to find - given how little Peter actually slept, he tended to just lie down in whatever he happened to be wearing. Still, with such a specific request, he rooted around, eventually finding a pair of loose black sweat pants and a (gasp!) white tank top, that would serve.
Rather than teleport directly into her room, Peter snuck into the hallway and the handful of steps to Heidi's door, knocking lightly.