At Gaycest.com, things get taboo. Like, really taboo. Not a lot of the use of the adjective "step" before the word "son." They let you work through that shit on your own. The eroticism can reach a new dangerous level...and that's damn exciting. Cuz c'mon, it's all fantasy. So enjoy the fantasy of "Daddy's Little Boy Tape #1: Mr. Armstrong & His Boy Austin, Big Boy Underwear." Mr. Armstrong, the tall, thick-dicked Daddy here contemplates, then acts on, the sexual heat emanating off his son Austin towards him.
Austin's a little guy for his age, and Dad just wants to make sure he grows into a proper man. So when he finds childish underwear amongst his son's things, he thinks it's time to leave childish things behind. he presents him with "big boy underwear" which the lad is sheepish but compliant about trying out. Seeing his son exposed causes Dad to feel...a certain way. he offers to undress himself so the lad won't feel so unconscious. Gee, wonder where this might lead? it leads to the youngster taking Dad's long meaty tool like a damn champ, swallowing it down before Dad has him bent over, eating out that tight hole before plunging in deep, filling his son with that which sired him. Then bred him!
Big dick for such a little guy!