Tiff moaned and I glanced and saw motion between her legs.I croaked again, “Tiff what are you doing. That isn’t right.” “It’s ok little brot...er. As long as we don’t touch it is fine. I know you want to jerk off. It is ok. I want to feel what they are feeling right now. Please stroke your dick while I rub my pussy. As long as we don’t touch it is ok.”She repeated that same mantra a couple more times I am certain it was to convince herself as much as it was me. I began stroking slowly uneasy. Just a minute, I'll get Mom." He heard her set the phone down and yell for her mother. "Mom, telephone. It's Uncle Dave."David could hear Jennifer say something back but it was too soft to make out exactly. A moment later, Jennifer picked up an extension and hollered that she had it. A second after that he heard the click as, presumably, Molly hung up the phone."Hey, little brother. Is this the call where you tell me you're coming to visit?" What choice do I have? All the women in my life are. .. that's what I enjoy. Just concentrate on breathing ... breathe ... that's it." Kira bobbed in long motions, my son's penis becoming over-engorged. "Do it, Dex," I told my son, "fill her mouth." Kira braced herself by making her movements more shallow and tightening her lips. "Cum in your sister's mouth, Dex ... oh, God..." My fingers were sliding between my legs as I watched.My son started to jerk. "Oh ... Oh ... it's coming ... I'm cumming ... Oh ... Oh ... Uuuuhhhhhhhggggggg .... The shower is through my bedroom." You'll get no argument from me Larry. Lisa, why don't you get our nighties out, then you can shower with me." Okay Tina, but I'm not sleepy!"Tina stood with effort and walked to my room, leaving the door open. I opened up the hide a bed and realized that the sheets were all dirty.I could hear the shower running, so I looked at Lisa, thinking to ask her to get the top sheet off my bed. She was busy rifling through their baggage and I decided against asking.