I had looked at a number of porn sites to see how this was done without killing the girl in the process. I immediately wondered how loud she would be ...f the house had been empty at the time. Maybe some other time?I was having a great old time, trying hard to keep her from screaming her fucking head off.“Hey Sis, I’m going to cum inside your butt. Would you like that? You want your little brother to put a load up inside your great looking backside?”“Ohhh, God almighty, little brother, fuck me,. Then she insisted that I put on a crotch shield before trying on some other panties she had selected for me. I took off the red catsuit and Odette helped me roll down the brand new panties; adjusting the crotch shield. She used her finger to stuff the shield between my labia and tightly against my asshole, before helping me try on three different sizes of panties. She managed to rub her hands all over my butt and vulva. I even managed to have an orgasm from her touch; trying to muffle my moans,. I knew what that meant. She smiled at me “oh I am going to enjoy this” she said and moved around behind me. I feel something being spread on my bum hole. Lubricant. Then I felt to head of the dildo pressing against my anal opening. I braced myself as I felt it being thrust into me. Not inch by inch but the full length in one action. I squealed but it was muffled because as I opened my mouth wider the cock in my mouth went deeper. The dildo was withdrawn almost fully and then rammed in again and. Her eyes were slammed shut so I gently widened her legs a bit further wondering how far I could go before she woke up but didn’t want to come across as a pervert so seeing a bottle of lotion on the table I had an idea.I applied some lotion to my hands and very slowly started to rub Mrs R’s shoulders and back, all with no reaction at all so I applied more lotion to my hands, probably too much, and started to rub it into her buttocks in a slow circular motion to start with and then applying a.