In a surprising twist, my ex-girlfriend's mum asks me to masturbate for her, claiming she's curious about how I've changed. I hesitantly agree, setting up my phone to capture my POV as I stroke my small but eager cock. I moan softly, imagining it's her tight pussy gripping me instead of my hand. As I approach climax, I wipe the sweat off my brow, my heart pounding with a mix of excitement and disbelief.