Ty decided to make Mark's wishes come true, and internally wish for himself to become the opposite sex and regress to the age of ten years old. His frame gets smaller and slimmer, height shrinking a couple of inches as his face becomes slightly more feminine as well. When the transformation was complete, Ty was a full girl, being a foot and a half shorter and his hair slightly longer while his clothes were a few sizes too big. Shorts and boxers were the only thing that were too big for her, falling off with ease leaving only her over-sized shirt to cover up her private parts.
"Can I sit on your lap, daddy?" Ty softly spoke to Mark, making the man look down and hearing him gasp with shock and confusion. "The monsters outside scare me..."
"O-Of course baby girl.." Mark softly smiles, not knowing sure why or how Ty was now a little girl, but at this moment he could not care, for his deepest wishes have finally come true. He pats his lap and watches his little daughter climb onto it. The heat that she gave off made the older male more relaxed than every, getting warm and comfortable with his daughter. But of course Ty new why Mark really wanted a little girl, her theory being enforced by the fact Mark was getting a slight bulge in his pants. "You feel so warm on daddy's lap, baby girl.."
"Daddy, what's this in your pants?" Ty brushes her fingers on the outside of Mark's jeans, causing the man to almost jolt from his seat.
"Wh-what the hell are you doing?!" He sharply whispers to her, but made no motion to stop her in fear of Ty screaming for someone. The little girl kept brushing the outside of Mark's bulge, feeling and seeing it grow bigger and bigger till he was fully erect under his pants.
"D-daddy..I feel funny down here." Ty lifts up her big shirt to show Mark her very wet slit, causing the older man to deeply blush. "It's s-so wet, daddy..I don't know what to do..."