Mom and me part 7

The next evening I told mom to dispose her excreta and to drink lots of clean water. She did that. She was curious to know what is the pose of fucking we are going to do that night. I toldmom " that is a suspense and will be tolin the night only ." At 9 we after consuming whiskey we entered the bedroom. I told her" today I am going to fuck through your asshole." Mom told " there are two things I have to tell you 1) is it not a perversion ?2) will it not be painful ? I replied 1) As long as the couple enjoy no sexual activities are perversion. 2) I will apply some butter around your ass hole.Also the slight pain will be only during first two minutes when first two inches of the tip of my cock enters. After that itbeill be normal entry " As per my suggestion mom fondled and made my cock huge and fully erected. After applying the butter around her asshole, I pushed my cock into mom's asshole. Initially mom was moaning due to slight pain. After that she became silent. My actions continued until my cock cummed into mom's stomach. We concluded our activities. Before sleeping mom commented " My darling son, it was wonderful experience. I never thought it will be so enjoyable. We will do it someone time during this two months "