No one saw the Finney and Vance friendship coming. Donna says she did but no one believes her.
Mom Arellano was concerned at first but quickly changed her mind when she saw Vance awkwardly trying to comfort Finney while waiting for Robin to arrive.
Uncle Arellano thought it was hilarious seeing Robin so worked up over someone else defending Finney. Having someone else beat up people messing with Finney before Robin had the chance.