Jill looked very seriously down at us and replied, 'Andy, really; go ahead. I want to watch. f**k her.' Jenna looked at her sister, smiled, and looked back at me. She started moving again and guided my almost-but-not-quite limp d**k back into her cunt. She moved her hips back and forth until I felt the blood rushing back to my c**k. Jill watched intently as we resumed our f*****g. My little sister bounced up and down on my d**k with renewed fervor. Soon we had resumed our previous rythm. Jen began grunting with every in-stroke.
'Yeah, that's right,' Jill breathed. At first, I sort of felt 'on display'; I'd never had s*x in front of anyone before. 'Yeah, Jen, f**k him...fuck his big fat cock...' Her words spurred me on. As my big sister watched me and my little sister f**k, I became more t
