The Dr.'s and nurse's at the Psych Ward are a team, one can't do their job if the other one doesn't do theirs. Its a very specific task when in comes to collecting this patients samples. The nurse, Ella, is new to this unit of the ward. She has been under Doctor Lulu's command and has been shadowing everything the doctor does. Ella is first up with the patient. She handles all the little, or in this case, big things so the doctors can worry about doing her job. Once she gets the patient worked up and hard, she relays to Doctor Lulu that the patient is ready for her. Dr. Lulu finishes the job, stroking his cock and riding him till she collects every drop of his semen inside her vagina.