Step sisters competing for the same cock
Based on what you see at the beginning of this scene, I'd say Kendra Sunderland's relationship with her stepsister Bella Rolland isn't all it's cracked up to be. The two of them always seem to be competing and this time they will also be competing for the cock of this boy who has come to their house. What a lucky bastard! This kind of thing doesn't happen very often.