Assigning an age to an off-screen character based on the age of the actress who plays her in the movie 30 years later is a bit of a stretch.Then she must have been 14 to 16 in the first movie and Maverick was 23... Am I looking at this the wrong way.
Tobie Macguire was 26 when he played a teenager in the first Spider-Man movie, probably best not to read too much into ages of characters bases on the ages of the actors who play them.