My son-in-law Frank is living with a pretty girl named Christine. She is thirty five, divorced and has two teenage daughters, Alicia and Amy. They have been together now for three years and live in an apartment about a half hour drive away from my wife Nelly and me. We go to see them quite frequently and sometimes they come to our place. Christine is a gorgeous girl with black hair and large natural boobs. Last Christmas they came for dinner with us and she was wearing a tight, short black dress with a cleavage that really exposed her ample bosom. She had high heels and black tights and I just couldn't take my eyes off her. I thought that Frank was a really lucky guy to have a woman like her. I hope he knows how to satisfy her. I certainly would if I had the chance, but of course it wasn't possible. If Nelly knew that I wanted to fuck her son's partner she would go berserk.
I was sitting on the sofa and my cock got hard when Christine bent over the table in front of me and I could see up her skirt, right up to her panties. God, she turned me on, I would have given anything to take her tights and panties off and suck her pussy before I gave her a really hard fucking. I imagined shooting my cum all over her big tits and licking it off. What if I could pull those white panties down and lick her asshole? Jesus Christ Frank, you lucky son of a bitch! I love sniffing a girl's dirty panties and I wondered if Frank sniffed Christine's. Maybe he sniffed her daughters' panties too. I sure would if I had the chance. Both young girls were very pretty and starting to burst out in all the right places.
About a month ago we were at their apartment on a Saturday evening and Frank showed me a problem they had with the toilet flush. Sometimes after flushing it didn't stop and he asked if I knew what the problem was. I had a look inside the cistern and I guessed that the valve simply needed adjusting. I said that if he wanted I could come over on Monday morning and try and fix it. He was pleased with this as it would save him calling a plumber. I was pleased too because this could be the perfect opportunity for me to get into Christine's dirty laundry. Then I had a nasty thought, what if Nelly wants to come with me? But luckily she had already arranged to go and see her mother so the way was clear for me to satisfy my needs. All the next day I kept thinking about what I was going to do with that lovely girl's dirty panties.