Affair with a much older woman

I started having an affair with a much older woman(20 years),we worked together and she liked that I didnt always come on to her like other men,and soon she rewarded me by saying she wanted a no-strings affair with fringe benifits.She rented a hsmall out of the way house that was very secluded and I started going over to see her and we wasted no time into letting ou pent-up urges let loose,she was so intense,and we had sex for quite a while,and I didnt even noticed that we were being watched by her 16 year old daughter,it freaked me out at first but she calmed me down and with that her daughter started to undress and play with herself in a chair beside the bed,her mother new that she would do this often watching her either with a lover or when by herself and now she thought it was time for her to learn real sex not just birds and the bees.We had finished and while I recharged myself we both encouraged her to jerk herself off,both of us taking turns touching her stroking her until she had her first orgasm.With that her mother now took over,all of us now were in the moment and the mother then taught her to deeply kiss and fondle a man,she tried and was just still to far,so her mom told her to sit on my lap,as her 16 yr old pussy layed on my dick it got so hard and she got so wet.I then saw her mother gently lifting her butt iup in the air and she grabbed my cock and she told her daughter to sit on it gently,as she did her moist tight pussy took off up and down,I told her to slow down and stand up as she did I licked her sweet clit and she shuddered in another climax.I turned her around and sat back as she sat back down on my cock and as she rode her mother went down on both of us,after abut 5 mins of this I pulled out and came all over her,her mother cleaned us up and everytime after that it would be only me and her mother and she would usually not be home much,now 15 years later I ran back into the daughter,who now is 31 and we from time to time get together for old times.