Fiona had just had a bath and was in the bedroom. I was getting ready to take Nathan down to ball practice in about an hour's time, and knocked on the bedroom door, asking if I could come in. "Yes", she said quietly. Fiona was lying naked on the bed, covered only by a small towel. One of her nipples was peeking at me, and Fiona was drying her crotch. I got an instant hard-on but assumed what I was seeing was off-limits. I...