I'll never forget the first time I had sex with my cousin Dana. She is 5 years older than I am. I was 18, just out of high school and looking forward to college. She was 23 and was still living at home while working as a secretary in town. My Aunt and Uncle always told me to come over and swim anytime I wanted to. I was working hard for spending money at school, but was frequently at their place swimming or working on my tan.
Dana also spent her late afternoons in the sun getting a tan. Early in July we were in the sun talking and trying to get that perfect tan. She was lying on her stomach with the straps of her bikini untied and I was on my back. The buzzer we set up to remind us to turn over went off and I rolled onto my stomach. Dana, completely forgetting I was there, just rolled right over. Before I could warn her, she was totaling exposing her gorgeous breasts to me. At first she shrieked and started to grab for her top, but then stopped.
"I guess you can tell I've been sunning topless before", she said. "I might as well just leave it off and keep working on my tan since you've already seen me now."
I could tell she had tanned topless before. Her breasts were starting to get a light shade of brown. I really started to notice just how my cousin looked at that point. Dana was fairly short, about 5'3". She actually had a very shapely body. She had nicely sized tits (36c I'd later find out) with quarter-sized nipples, a tapering but not too skinny waist and flared hips. We continued to talk as I tried not to stare at her chest. She told me she was sunning topless so she could get an even tan no matter what she wore. I was finally getting used to talking to get like this when the buzzer rang.
My heart leapt. I suddenly realized a major problem I had. I was wearing Speedos. I was on the swim team in high school and I wore my Speedos when I was going out to tan. My problem was that looking at Dana had given me a hardon like I'd never had. If I rolled over, she'd definitely notice. She rolled onto her stomach but I just stayed there. I was hoping that now that she was no longer exposing herself, it would go away and I could roll.
"Roll over or you'll burn", she told me.
I told her I would in a minute, but she insisted. "I don't want you getting burned."
I knew she was right and I had to roll over. I rolled over slowly and was then on my back. My dick was so hard it was sticking up out of my suit. I glanced and Dana and her eyes were closed. I thought I was going to be able to hide it when suddenly I heard Dana gasp. I looked over and she was staring at my cock sticking up out of the Speedos.