It's time for mommy to teach you a bit more about the woman's body and the consequences as sex. You're a growing boy, you masturbate, I know it, don't deny it, son. I'm going to teach you lovingly just what it is like for a woman's belly to grow and stretch as she carries a baby to term. You wouldn't believe how much I suffered in pregnancy with you! You were past term and people thought I was having twins. It hurt so much! I have this aquarium pump here to show you. First, take off your pants, son, and mommy will spit on her finger and lube up your little asshole. Ooops there goes my finger, I have to make sure you are clean and ready for the hose. Does that feel funny? I insert the hose deep inside you and then plug in the pump. You don't feel much at first, and I decide to distract you by telling you about sex and pregnancy some more. I show you my MILF tits and hard nipples, and my pussy. I show you where you came out of. I touch myself and you feel the air start fill you and complain. I tell you that jerking off will help ease the discomfort. Take it like a man. Don't be afraid son, women go through this all the time. Look at your flat little belly getting all round and growing! It's so cute. It hurts, doesn't it? That's how I suffered with you but for 9 months. Take it for me son, grow and make your belly so big and round. Does it feel like it is going to pop? Oh well, that's how I felt too, don't worry. I'm going to inflate you to the max, and it is going to hurt. You'll feel like you're going to explode, jerk off harder, it will distract you. Mommy loves you so big and round like a balloon! Cum for me, baby, right when you feel you're going to blow!