“Is it locked baby?” she simultaneously asked as she undid her robe and let it slide to the floor. “Uhh yeah” I stammered, lying, unsure if th... door was locked or not because she had just come through it! But there she was again, naked except for that white G-string, perfectly accentuating her thong tan line. “mmm, mom I never thought I’d see you wearing a G-string” I said.“Oh GOD! I look fat don’t I! I’m sorry, here I’ll put my robe back-“ “No mom, you look amazing. Your ass, I mean, with that. Di brought a strap-on. She and M took turns fucking each other as the two boys and I took turns fucking M and Di. There was no way I was going to try and compete with 18 or 19 year olds in that department. I could still hump a 60-pound ruck all day and keep up with young grunts but I always paid for it the next day. Fucking, cumming, and getting hard quickly is another matter.Besides, it was fun watching two women fuck each other with the strap-on dick as they were getting fucked by the. She was moaning loudly and started pulling on my hair.I kept on sucking her pussy,by now she had closed her eyes and was moaning and sweating heavily.She was pushing her pussy against my mouth and was moving her hips up and down.After some time she pressed her thighs tightly agaist my head and said that she was coming.After some time she moaned loudly and her liquids oozed out.They were kind of salty in taste.She had a smile of satisfaction on her face.Then i smooched her and kissed her. One boy, one girl who were then 4 (the boy) and 6 (the girl). We've grown fond of each other and the k**s now look at me like I'm part of their parent's close friends which I am. For the sake of this story I'll call them Jeremy and Lisa - you'll soon see why.Bringing you back to reality, the k**s are now 16 and 18 respectively and they've grown into very nice young adults. We recently took vacation to the beach with them and this is where my life almost became unglued.One day I really wasn't.