I was a 53 yr old at the time, average looks with a full figure but good shape.Adopted my cousins little boy after her death sadly and being a spinster i spoiled him rotten.I was used walking round the house at times with only a slip on and i kept the bathroom door open.Since he was eight i began noticing him watching me in the bathroom washing.I then was aware he was m*********** in bed a lot so i suppose i got turned on a little by this.I let this go on a long time,he was a shy boy and i thought it would be good for him and educational also.Obviously a bathed him and was aware he was really developing down below.One day while in the bathroom i had just slipped off my knickers.I just had my slip on then which only half covered my bottom and he came in wearing his shorts.I knew he had been watching me as usual as i noticed his erection even at 10.I said are you ok son,he said shyly yes mommy could you give me a piggy back.I became s******* aroused myself then and said of course son dont be shy its normal to be excited you know.Would you like to slip off your shorts first son i asked,he smiled and said oh mommy can i.Of course you can i said so he pulled them off.Are you ready son,yes mom i am as he threw his arms round me and mounted my back.I could feel his c*** rubbing my bare back as my slip had slipped right up my back.He was really rubbing me hard now,i even had an o***** as he slid down my back and began pressing against my bare bottom.Within seconds i was aware he had just ejaculated over my hips.I said wasnt that nice son and he smiled and said yes mom.This became a regular thing between him and i, he would always ask for his piggy back at bedtime too.As he got bigger i stopped it though.Then one day when i was 53 and in the bathroom, he was now 16 and he came in and i asked him to talc my back.I was feeling really aroused so i said listen son you can do my whole back if you want and i stripped off naked.He stripped off also.I turned round,we kissed,hugged and fondled each other saying nothing and we began m*********** each other.I then said son lets go to bed.I taught him what he didnt know lets say.I enjoyed lying face down as he rammed his big c*** up me.Loved my juice running down his thick shaft as i screamed and his hot s**** shooting up me. We had raw s** for years until things just fizzled out.