My son's morning erection makes me grind my mother's climax and climaxing cowgirl sex

In order to wake my son, who is weak in the morning, when he strips his futon, he finds his morning erection, setting up a tent! I was surprised for a moment, but an evil thought crossed my mind. (Just a glance...as a mother, I have to check on her son's growth...yes, this is an obligation) He quietly closes the door, locks it, and slowly slides his pants down. I can't stand the masculine smell that suddenly spread. As the aching deep inside of my vagina was sought, I swallowed my son thoroughly...