Little Sister's Amazing Underboob

heard the sound of Tanya walking in flip-flops before I saw her returning to camp. She must have circled around once she was away from our campsite because she was coming back down the main trail instead of through the woods. As Tanya got closer, I couldn’t take my eyes off of her. Her nightgown clung to her body like a second skin, and if I thought it looked transparent in my tent, it was nothing compared to how well you could see through it in the full morning light. You would think that my cock would be worn out with all the action I got hiking with Tanya yesterday combined with our activities in the tent overnight and this morning. I tried to resist, but I couldn’t help getting hard as I watched my sister walk up the trail with her big, might as well be topless tits swaying as she walked down the main path back to our campsite. I didn’t know if I should count what Tanya did to me in the tent this morning as having cum once or twice, but I wanted to have sex with my sister now almost as much as I had when I woke up with her still in my sleeping bag. I decided to go back into my tent to start packing up as our parents noticed that it was Tanya walking to our campsite. The fact that her nightgown had become almost like a wet tee shirt walking through the cool morning air to hide which tent she had slept in might have distracted our parents from my raging boner, but I didn’t want to take that chance. As much as I longed to stay and ogle Tanya, I didn’t want to get busted for something stupid, especially after escaping detection for sleeping together right under our parents’s noses. Also, the way Tanya had squeezed on my cock this morning in the tent seemed to have made it really sore. It kind of hurt to be as hard as I had gotten watching her return to camp.

“Tanya! Where did you come from?” Mom exclaimed.

“I had to pee, and everyone was still asleep. Since I was already up, I decided to get up and watch the sunrise.” By this time, Dad had noticed what Tanya was wearing. Even though I had retreated to my tent, I couldn’t resist watching my sister. Somewhat to my disappointment, she started tugging on her nightgown so that it wasn’t clinging to her skin quite as much.

“Hopefully you were watching alone,” Dad said disapprovingly.

“What’s that mean?” Dad replied, “You’re not a little girl any more.”