2T4U/Fuck Aaron
Apart from that time in a Thai brothel. you have always been strictly hetero. but watching your eight-year-old son exploring his sexuality like that has made your already stiff cock even harder. His hole is gaping after being stretched by his fingers and he is concentrating on jerking off.
Your cock is looking for a hole and there's one right in front of you. The memory of that ladyboy in Bankock and how it had felt when you slid the full length of your cock into his smooth ass comes back. A shock for sure when you felt his cock and balls, but you had paid in advance and still had your money's worth. Now you are holding your stiff cock and looking at your son's ass.
There's no way you can get your fat eight-inch dick in his small hole, even stretched as it is, but your body responds to your will yet again as this thought comes up as your monstrous dick compared to his tiny ass suddenly begins to shrink to half its length and a significantly smaller circumference. It's bigger than what Aaron has, but certainly nothing like the monstrous adult cock that you had before. The problem is - how will he react when he feels something other than his own fingers in there?
You try reaching out mentally to see if you can control him without actually taking over. His thoughts are confused. On the one hand, he gets pleasure from rubbing his cock and he wants to try sticking in one of his sisters, but on the other, he really enjoys the feeling of having his ass stretched and he wonders what it would be like to do it with another boy. You are able to put him in a dream-like state where, as you slide your now shrunken but still hard cock through his sphincter, he thinks it's just some kind of dream.
It's not just the feeling of his colon squeezing your cock, but the sight of his butt-cheeks and his moans as he braces himself against the wall while you fuck him. Apparently, Jack has told him that Gary Blake has been fucking his kid brother, Trevor, and Aaron is fantasising that it's Gary's man-sized cock in his ass. You don't know how big Gary is, but you increase your own size anyway and Aaron starts clamping down on you as he ejaculates against the shower wall.
You didn't cum, but you gently withdraw and leave him to get himself cleaned up while you: