To watch the smile spread from ear-to-ear on her young student's face as Doc crouches next to him, makes Katherine's heart flutter a bit. She finds it hard to take her eyes off of the man as all the children take their time getting into place. So she doesn't.

She's whispering into MaryAnne's ear, eyes on Doc's profile, when everyone is finally ready to go.

Yeah, she's a little smitten.

"On your mark!" cries one of her boys. She sets her hands on MaryAnne's waist, encouraging her to, above all else, have fun.

"Get set!"

"GO!"