>>30326379Let her feel useful in the relationship.
Throw her out last in battles. This will make her feel like your ace.
Leave her out of her ball.
Give her Pokeblocks so that her hair has a nice, healthy sheen.
Give her a megastone so that you can take her out to fancy dances.
Always finish inside. Never use protection. Let her share your bed.
And then, when you're ready for children, let her get raped by a Muk and start the process over again with a Ralts that has better IVs. Discard the first Gardevoir to the PC box.