The sensation of being inside his mother's vagina is too much for the lad.

Feeling the incredible tightness around his huge girth sends him over the top and before he is even halfway in, he starts to cum, his body jerking with the violent force of his orgasm.

"Moommm!" The boy wails as jet after jet of his thick incestuous seed floods his parent's depths.

For long seconds, the boy just cums and cums, until finally the ejections become weaker and weaker until with a sigh, the boy collapses on her, almost crushing her with his large body.

Never has he felt so good...

"Mark? Mark? Are you alright?"

Vaguely, he is aware that someone is calling his name.

"Mark? Please get off, honey. You are crushing me."

Then the reality kicks in and suddenly his bliss is replaced by a mixture of embarrassment and shame. Quickly he jumps off, the sudden movement causes his still hard erection to pull out of her.

"Oohh!" He hears her gasp.

"You okay, mom?" He now remembers her cry when he..erm... first entered her...