Mother-In-Law Sex

Mother-in-Law Sex

(Inspired by the sexiness of my mother-in-law and larger-sized women: Be Happy Girls!)

Whenever I had any minor aches and pains, it was my mother-in-law, Mae, to whom I, and the whole family, turned to: she was an ex-nurse after all.
We all lived in the one house (the one I had bought as part of my wedding payment): me, my wife, Mae and younger sister of my wife. Funny I guess, but I am older than my mother-in-law, though yes: I call her Mae (mother) – only 2 years mind! My wife and sister-in-law, Nui, both worked every day; Mae had recently resigned after a dispute at her hospital, and I had been retrenched – but comfortable enough on my savings and superannuation to live well and support the family.
One morning a few months back I woke with a crinked neck when my wife pecked my cheek ‘bye’ as she and Nui headed off to work; I couldn’t relax, so after making the bed and ready to head downstairs, decided to have a shower and massage my neck to see if that would help. But my bathroom downstairs only had cold water, so instead I opted for the upstairs bathroom hot water, stripped off my shorts (all I needed to wear in the house) and soaped up and massaged my neck under the shower.
Neck seemed a little better as I rubbed the soap all over, then down my body elsewhere, all over, then up and lingering on my dick and balls as I dreamed. My wife had enjoyed sex before we married, but seemed suddenly to turn off after that, so it was stressful to push myself to her against her wishes, and her desires were few and far between. Think ‘frustrated’ is the word!
I had taken, as an alternative, to reading sex stories on the web when I was alone at home, stroking myself sometimes to a spurting climax, sometimes just getting hard and enjoying the feeling as well as some good stories. One site had all sorts of themes, including naturally Incest, but also Large Women, and I found myself increasingly drawn to this area after an early story drew images of my mother-in-law as I read it; she was large: Asian, so short-ish height, but a big loved-her-food eater and now not working, she had developed a thickening girth and buttocks, matching her always big breasts which, of course, I had noticed for some time! Yet, together with her large size, and nice, big boobs, she had beautiful, slim legs, and slim wrists and arms to her shoulders. Her face was also very, very pretty. Say it in three words: Big & Sexy!
This day, (deciding that rubbing my neck was no substitute to..) rubbing my prick, dreaming of long-ago sex – honestly, a nice dog in our street had begun entering my thoughts about how to get some sex – actually still does enter my thoughts! –these thoughts were suddenly interrupted when Mae burst in to the bathroom (I thought she was asleep still), exclaiming on seeing me “Sorry son, must go to the toilet very fast! Sorry!!” as she hiked her nightie (the purple silk one I had bought her on one trip overseas I noticed, one which showed her large, pointy nipples very well), sat and let out a fire-hose sounding amount of piss into the toilet bowl, her knees virtually rubbing my calves – as the toilet was just to the left of the main shower area in the all-Tiled Asian-style bathroom.
I had stopped rubbing my cock after a few seconds shock and just tried to turn my rear towards Mae’s bent over head as she strained to release the last few drops of urine, but then I felt hands on my buttocks!
Now, I was the lightweight in the family; all of 52kgs when heavy, bones and not much more since childhood.