She clapped, then got up on her knees and leaned over his back, fingers touching (always touching. she was in a touchy mood and it was just going to happen, Stiles), running from dot to dot as she angled her head and tried to find the constellation in question.

A few minutes later had her making an exclamation, almost leaning over him entirely as she traced it over his side and up close to his armpit. "I found it!"