Doing Squats For My BBC Step Bro

Description: My step brother wants to help me with my workout to give me advice on how to make my as bigger. he tells me i need to be naked and he needs to lay under me as i do squats to make sure i'm doing them correctly. i know he's just being a perv but i play along because he's cute. i start the squats an notice his bbc growing in his gym shorts, he wants his step sis so badly! i tell him to jerk his cock and tease him by playing with my booty as i continue the workout.