She arrived and I was a little shocked by her appearance, she was more over weight than she used to be, she looked very much her age, 59, and she walk...d with a limp, apparently resulting in a car accident some years ago. Anyway as we talked about our lives she said her husband had had a stroke some 5 years ago and he was bed ridden and she looks after him 24/7 but she gets one day off a week when his c***dren look after him for her.I told her how sorry I was and she started to cry, I got a. I expected to see her wearing shorts under her robe. I figured the worst would be her panties. So the guys might get a peek of her panties; a little embarrassing, but not really too bad. What I saw was her naked ass!I was dumbfounded. She has an excellent body, and I always encourage her to show it off a little, but it seems she rarely does. One of the few times she is naked under her robe, I end up showing her ass to my friends. And there was no doubt they saw it. "WHOAAAA!" they both said in. "I've never felt anything like this before." "You need to hurry." She responded. "Jack or Larry might be home soon and if so, you're a pervert standing naked and hard out on my patio and I had no idea you were here." With that, she began to quicken her pace, going all the way down my shaft and up over the head, watching my hips jerk with each stroke and listening to my quickening breath. She smiled at me with her pearly white teeth as I stared into her eyes. Her bra-less breasts jiggled. I finally had my answer. Howard and Erica had had such powerful sex drives that they were trying to relive their swinging days. I told Mom what I had learned but she was skeptical. "I don't believe in such things," she said. "There must be another explanation."That night I awoke to a hand jerking my cock and Mom's howls echoing off the walls. The hand pulled my cock all the way to Mom's room. I was stunned to see Mom thrusting her pelvis upward to welcome an invisible lover. The hand led me to.