The solid length of my big brother was nestled against me, clear evidence of how the sounds were affecting him, even though he made no attempt to be s...xual with me. In time, however, my arousal was growing to an extent that I needed some relief. Due to my period, it had been over a week since my last orgasm, and the length of time combined with the unmistakable sounds of sex caused my desire to overflow my body. ‘It’s been so long…’ my big brother finally whispered softly as the natural light. She was washing her own breasts, something Uncle Bob had awakened her to during baths in the last couple of years. She felt the urge to stop and squeeze her nipples. When she did, the combination of that and her Uncle's finger in her pussy sent her over the edge."Oh!" she yipped when it started. "OH!!"Bob saw what was happening and dug his finger deeper into her tight pussy."OHHHHHHHHH!!!!!!!!" she moaned as her pussy flooded with juice.She gripped the sides of the tub and bent over, one hand. For the first time I also noticed the sizeable bulge in the front of Vince's white shorts."So is there anything special that you want me to work on today . . . any areas that have been bothering you?"Natalie sighed again and said, "Nope. . .I've never really had a massage before. You're the expert . . . I'll leave it in your hands." Then she giggled at her own bad pun."OK . . . you just relax and leave everything to the expert," Vince laughed as folded the sheet down to expose her lovely back,. “My, don’t you look all hot and sweaty. You can use our shower indoors to clean up if you want.”I was tired and not entirely with it so I thanked her and followed her to her building which combined their house, site office and shop.I’ve stayed at this site many times and knew Sandra and Geoff from those visits but never got much beyond passing the time of day before. As we were passing through the shop area that wasn’t due to open again for another hour, I wasn’t considering the unusual nature.