Grinning and giggling at the sight, "Andy" decides to run back to his room before Jeff catches him. Being caught by his brother in only a pair of underwear, while not as embarrassing as it normally would be, still isn't something he wants to experience. What makes the thought even less appealing is that he's wearing girls' underwear, and he doesn't know how Jeff would react to seeing that.
Hurrying back up the stairs, the 10-year-old boy enters his room, closing the door behind him. He sits down on his bed, taking a moment to think. "This game is cool... I want to try it out some more! But, what should I do next..."
He pulls his briefs down, looking at his penis, a faint blush on his face. "I think I'm gonna stay like this for a bit... Just to see what having this is like..." He pulls off his briefs, setting them on his bed, and spending a moment to look at it. He holds it in his hand, wanting to see how it feels.
"Ahh.." A faint moan came from him as he touched it, moving it around to look at it. "This feels... good..." He spent another moment rubbing it, before moving his hand away, thinking about what happened.
Only a few minutes ago, he was a girl looking for a coloring kit in her brother's room. Now he's a naked boy, with a "game" that can alter reality, who was just touching his penis out of curiosity. He blushed with the last thought. "This is weird, but... so cool!"
He looked back at his tablet, thinking about what else he could do with his new "game". "Hmm.. hehe, maybe I could reverse the roles, and make Jeff my younger sister! That could be fun!"
He picks up his tablet, thinking of other ideas. "Or maybe I could try... hmm... so many options!"