Turning to the side, I admired how far my breasts stuck out in front of me and how far my round ass stuck out behind. I was my son’s personal porn s...tar; his fuck-thing to drain his semen into, his penis’ loving mommy, and his dutiful girlfriend. I reached for my blouse to put it back on and left it unbuttoned, exposing my bare breasts, and walked back towards the kitchen.Coming back into the kitchen, I grabbed my large water bottle, walked up beside him, and rubbed his back, inspecting what. I wondered what would happen at bedtime. Dad’s birthday wasn’t until tomorrow.Courtney answered my question when she asked me privately if we could trade partners with Albert for the night. I nodded my OK. Albert’s wife Clara was a very pleasant white-haired sixty-six-year-old. I just hoped she didn’t snore.Clara surprised me by coming to bed naked. Her still-full boobs sagged a lot but her hips were trim and her greying pussy hair was neatly trimmed.She smiled and said, “I know all about the. One bare breast was pressing against my chest and my underpants had slipped down a little and about half my exposed cock was digging into her thigh. In completely uncontrolled lust I started to slide my hard-on up and down against her leg as I began to lick her face. I don't know why I did this - I just seemed to be operating on auto-pilot, doing whatever came naturally, and this seemed to be the thing to do. I saw Mom come awake in the faint glow from the outside security light and she didn't. I didn’t know him very well, but I gathered that he was a young entrepreneur of some kind because he was gone for days at a time.“Well?” Courtney asked.As far as dares went, this one wasn’t so bad. It wasn’t like I’d have to text nudes to someone or do anything else that would leave evidence. I heard that Courtney was dared into a blowjob contest before with some random guys, so this wasn’t nearly as bad as that. I just had to put on my birthday suit and take a dip. It was dark, he was gone, I.