She moaned, shuddering, big tits jiggling over my head. I wiggled my hips, pressing back against my sister's girl-dick.The tip popped into my snatch, ...y pussy lips stretching around her thick girth, aching to be filled.“Fuck your little sister,” groaned Mom, my tongue brushing her clit. “Breed her. Give me a futa-granddaughter!”“Yes!” Deidre howled and rammed her dick fully into my cunt.I shuddered, my sister's futa-dick stretching my pussy open, filling me to the brim with her girth. My eyes. And no one was any the wiser to the relationship between Samantha and Pete. They'd kept their secret well. No one but Pete and Samantha had ever known that in addition to being a brother and sister pair, they also fucked each other on a regular weekly and often many times a week basis.Nearly 25 years had passed since the last time Pete and Samantha had shared a fuck together. She'd left home, grown into a mature woman and married and had 3 kids in the interim years. Pete's life had moved along. LORI," he called out to his sister who was soon at his door."What do you need Tommy?" Lori said as she came to his doorway."I ... uhh ... I know this sucks, but I really need to take a piss." Tommy said."Are you sure you can't wait until mom gets home," Lori replied."I really wish I could but I can't and I need your help," Tommy said, "Please."Lori didn't say anything but just walked slowly across the room and picked up the urinal. She knew what to do but was still hesitant to proceed.Tommy. I told her we had to buy it ,“we couldn’t find a nice one at the camp”.She then asked if we went into the camp where Em told her no. “You should go back there and check things out ,make sure the furnace is keeping the pipes from freezing and there are no leaks”. When Emily went to pay for the meal I whispered to Lee “Em wanted to go in and play but I wasn’t sure if you would be okay with it.Of course I would silly ,go back and have some fun”Lee said “you can do it whenever she wants too” then.