When Mikey tells his brothers he has romantic feelings for Shelby when the others see her as family:

Raph when Shelby walks in the room:

Shelby when the boys order jellybeans and maple syrup on the pizza:

Leo when Shelby questions his directions for the fifth time that patrol:

Donnie when he gets to take another DNA sample from Shelby:

Shelby when Donnie gets to take another DNA sample from her:

Casey when the opportunity to say "Small Fry" comes up:

Shelby when Casey doesn't call her "Small Fry":

Shelby when Raph calls her "Bradford":

Mikey when Shelby defends him from his brothers:

April when she drags Shelby to the mall:

Shelby when she gives in on going to the mall:

Aiden and Shelby when they see each other:

Tyler caught in the middle of his siblings:

Aiden when someone tries to flirt with Brianna:

Brianna knowingly breaking so many morals and ethic codes to try and save her father:

Splinter watching Shelby turn into a wolf knowing he's gonna have to buy her more clothes: