Has Mom got a phat ass ? Someone at the gym said that mom had got a phat ass and she has come to her son to ask some fitness advice, of course he knows the perfect exercise to tone up mom's big ass. Firstly he get's her to try on and show him her thongs and squat then get naked and squeeze the tip of his cock with her ass cheeks which will tone her ass and squeeze his cum out. Just remember don't tell dad ;)