Novice Massage Therapist After Serving Client｜Boss Uses Dick to Check Semen Inside the Hole

「How do you know if the guest has been properly served?」

Just finished serving the client and returned to the studio, the boss wants to check if the new massage therapist's skills have improved
Hearing there's semen inside the hole, directly uses the cock without a condom to spread it open and inspect, otherwise how would you know if the master is lying?