You've started getting erections and having wet dreams frequently so when mommy comes in to clean your sheets, she realises she's got to explain a few things to you. She tells you about how the white stuff, your semen, is meant to go in a woman's pussy. You're a little confused so she somewhat reluctantly decides to show you hers to explain. You ask if you can try it in mommy's pussy but she tells you absolutely not - moms aren't supposed to let their sons do that!
But you're determined to see how it feels so you start sneaking up on mom and stuffing your cock inside her before she can notice. It feels so good you instantly ejaculate inside her and leave mommy with big sticky creampies all over the house. She softly scolds you and reminds you you're not allowed to do that to mommy. But you just can't resist and one morning she wakes up dripping with cum. You admit you filled her pussy with 7 big loads while she was in bed and mommy finally admits how excited it makes her too...