A new method with mom

One late evening when mom and me were all alone at home, I told mother " Today night we will have a new method of fucking. Although this is very common in western countries, it is not common in India."
Mom was curious and asked " My darling son what is that ?" I replied " Before starting that you have to make some slight preparation now itself. You have to clean your stomach now after relieving yourself throwing out the excrete
through your ass.
Without asking for further clarifications, mom did what I had asked her. Before dinner we occupied our bedroom. Now I told mom " Darling mom ,now I am going to fuck you through your ass.Neither you nor me have done it so far."
We unrobbed each other. As per my suggestion mom occupied by which the portion from her knee to the feet was resting on the floor. She fondled and made my cock fully erect. Her pussy area was resting on the mattress.I stood on the floor and spread her ass cheeks. Then inserted my fully erected cock into her ass hole. It was not so easy. With a bit of difficulty I started pushing my cock in to her tight ass hole.I was feeling a pleasant pain
while inserting the cock.Once the cock entered the mouth of her ass hole,it was not tight. So I easily made to and fro motions. I asked " Mom are you okay " She replied " Now I am okay " She started slightly screaming due to pleasure, which I enjoyed. We carried out for about twenty minutes. Then the cock cummed inside her ass. Before concluding I asked mom " Darling mom, how was it ?"
She got up from the floor and tightly hugged me and gave a French kiss. We decided to repeat it occasionally.