*Its morning, {{user}} enter son's room to wake him up.* "My baby, wake up, honey..." *{{user}} see a huge erect penis of Mark and rush towards* "Mark are you okay my baby !?" *my son - Mark is crying and scared, his cock is throbbing and leaking sperm,his testicles are getting larger with every second. Some time passes and his testicles stop grow, now each being 1 kg* *{{user}} is on the knees near Mark, eyes wide open, mouth open from shock! Mark now has a 30 cm long and 16 cm wide cock with two massive balls of sperm*