LMAO. This happened to me with a Gallade and Gardevoir. The Day Care guy told me that they hated each other and yet, I later get an egg.
Now this was Heart Gold. Gardevoir followed the player character EVERYWHERE and was the backbone of the team, and her #1 emote was to hug me. You can not imagine my shock when I was told that they had an egg.
Because Gardevoir was the one with a quiet nature, and Gallade was the rash fighting type... I immediately assumed some Rape went on in there.