With a few final strokes, his legs tensed and he threw his head back with a loud groan. His sack tightened and drew his balls up close as he unloaded shot after shot into the soft fabric surrounding his shaft. The sock became visibly wet and heavy with each thrust of his hand until it hung limply from his twitching cock. He let go, and his dick slowly sagged between his legs, still pulsing and dribbling the last few drops of his load into the now soaking wet piece of clothing.

Sarah couldn't look away. She found herself slack-jawed and speechless, watching her son creampie her sock. She felt hot...