And of course she had on a black bra and see thru black panties. I mean they are like net material where you can see exactly what's under them. This d...finitely had me excited about the evening.Casey showed up and I met him on the porch and as we smoked a cigarette, I started talking about the things me and Kim talk about. I told him that we talk about including another guy and that tonight might be the night.He said " you want me to fuck Kim?" Yeah if it's cool with her," I replied. We walked. As Dad was cooking dinner we went out there to play pool. Almost as soon as the door closed behind us, Shelly pulled up her shirt and bra and I started to suck on her hard nipples.She sat on the table and i slid my fingers up her shorts rubbing her clit through her panties. I got scarred thinking my dad might come in and stopped. Not a minute later after we fixed our appearance did he open the door and check in on us.After dinner, lying in bed that night I was hoping Shelly would make a return. " "So Dad's going to be gone all weekend?" He said that he would be back sometime, Monday," she smiled back him, self-consciously, trying not to blush.She felt strangely exhilarated. Seeing her son's cock had done something to her. She had just never thought of him sexually. And then to suddenly see him fully erect and being sucked on by another woman. She couldn't explain it, but it made her all warm and damp down there where she shouldn't be warm and wet."That's too bad," Steve said."That. Mom was resting on one elbow, still kissing me while wrestling with my cock. I felt her lips part over my cock end as she pushed down and a gasp from mom as she took my cock deeper inside her.Our mouths broke free as mom rested on both her elbows and started to thrust back and forth while her breathing increasing the more inches of cock she took. Her face was only inches over me while her big tits rubbed back and forth on my chest.I ran my hands over her back and gripped her waist, giving.