Grant after spending the weekend sampling the carnal delights of young Tess returns her home to her mum Tanya. He finds her aunt Ronnie there too, and finishes up taking her aunt to his apartment for a sleep-over (not much sleep tho). They are joined in the morning by Tanya for what develops into a sensual threesome.
Jack thought he had the house to himself when he threw the adult tape in the VCR and imagined himself as part of the picture. He didn't know his grandmother was home and she also wanted to be part of the action