A motion in Erin's direction caught my attention and when my eyes slid back over I realized Amanda had lifted up Erin's shirt, revealing her tits. Boobs! My head screamed at me, but I had to lay still and couldn't get a better look. Then I heard the light smacking sound and my sister moved in a bit closer, looming over me. Click, click, click. Erin and Amanda were making out over my head, and at least Erin had her tits out for it. Knowing Amanda, she'd probably gotten hers out first to make sure Erin couldn't complain.

The noises finally stopped and Erin slipped her shirt back down. The...