Molly poured Miles another bowl of cereal, as a token of good faith to her current son. Molly wanted Miles comfortable, relaxed, and actually enjoying his time with Molly. That was going to make the change a whole lot easier. Normally the two would be at each other's throats at this point, but Molly had no reason to be angry. She was going to be gaining a wonderful new sister.
Molly and Miles made their way to the living room, chomping on their new bowls of cereal as they flipped to the channels. They eventually made their way on switiching between Good Morning America and Live with Kelly and Ryan. Normally, Miles would be complaining, wanting to play video games or at least watch cartoons. But something was very... right about all this. So he decide to simply eat and enjoy himself, even laughing at some of Kelly Ripa's stories.
Molly glanced over to her son, and smirked as she noticed some very subtle changes. Miles grew a little bit taller, just slightly, as he aged from 16 to 19. It was a very subtle set of changes, nothing you'd notice if you weren't looking, but it was there. Molly watched as Miles's body shifted slightly was well. His shoulders were slightly broader, his hips slightly wider, and his body started to skinny down. There was still a ways to go, but Miles was well on his way to being an attractive female.
Option 1: Miles can't help but to comment that one of the guests on the morning shows is attractive.
Option 2: Molly and Miles begin to plan their day together. Molly has some surprising suggestions, but Miles just goes along with it.