It’s time for another checkup for King, the feisty Great Dane. I realize he remembers exactly what happened last time and his cock is fully engorged. I can’t help myself and deep throat his doggy cock. Before I know it, his k9 cock is in my pussy, knotting me. I haven’t forgotten why King is here so I be sure to collect his sample in my pussy and transfer it to the sample cup making sure to milk his cock to get every last drop. I give him back to his owner and hope to see him next checkup.