I went upstairs and returned downstairs faster than Mom had, wearing my gray board shorts and nothing else. Jenna arrived a minute later, wearing a loose white T-shirt over her bikini bra and a beach towel around her hips. As soon as she entered the house, she un-tucked her beach towel and showed me the front of her small bikini panties--it was a red thong that just allowed the outermost sides of her fat labia to show.

She spun around, whipping her towel to her left side and showing off the thong running between the firm cheeks of her bubble butt. The nylon was thick enough to cover her crack...