June and Solomon are siblings who have a very tumultuous relationship. June is constantly upset

about their relationship and wishes that Solomon demonstrated more empathy and familial love.

June says to Solomon that he can have her new speedboat provided that Solomon agrees to be a

kind and loving brother for one month.

Solomon undertake his obligations and showers June with the brotherly love she desires. At the end of the month, Solomon asks June for the boat. June refuses to give it to Solomon. Can Solomon sue June for breach of contract?