Kai is a full-time university student and has a casual job babysitting some of her neighbours' children. One day, Kai's neighbour Jun asks Kai if she could babysit her son on Fridays for 3 hours for the next 2 weeks. Jun says she will pay Kai $150 at the end of the two weeks. Kai agrees. At the end of the two weeks, Jun thanks Kai for looking after her son and tells Kai, she will electronically transfer the funds to her. A week has passed, and Kai has yet to receive the money she is owed. Kai is upset and tells her friend Leo what happened. Leo is upset for Kai and decides to personally sue Jun for $150.

Explain whether Leo has the right to sue Jun for the $150 owed to Kai? Ensure you explain the relevant law in full before justifying your answer