In one violent motion, I shoved my head between my sister's legs. Nose, mouth, tongue all pressed into her pussy. Betsy was dripping wet. Her scent heady. Her flesh soft and pliant. It didn't seem fair to compare my sister's vagina to another girl's. It's not like she could control it; this wasn't something that she'd achieved. And yet her sex was so amazing next to any I'd ever experienced, I almost felt bad for my exes.

I matched my sister's earlier enthusiasm with my own actions. I licked at her with abandon, hoping that if I moved fast enough, she would forget about her misgivings. Sure enough, I felt...