No, not in the sexual sense, they're literally grooming the protagonist to take their place as the games go by, at least is what I have noticed from gen 2-4

Gen 2 has Lance asking you for help while dealing with Team Rocket shit

Gen 3 has Steven working alongside you and explaining about the lore while helping you get better pokemon (ORAS is a bit more in the face)

And Gen 4 being the most obvious with the fact that Cynthia is just expecting you to beat the shit out of everyone and deal with the Legendary by yourself.