Well today I tried to see, if my family members would interact with each other, like they sometimes do when dropped on each other. Kids sometimes play train with each other or have a "giggle party". The parents usually try to make a baby or argue about having more kids.
So today I dropped the father on his eighteen year old son to see, what would happen. I was surprised to see them arguing and receiving the message that they had the same gender. I tried again and the same happened. So my curiosity led me to try the same with the mother and the son. And after arguing about it, they actually tried to make a baby! Gladly it didn't work. Maybe because she already was 49 or maybe the game just didn't "allow" it.
I was really very surprised to see this possible in a game that emphazizes marriage and family so much. Is this a glitch?
I am really curious, if anyone else has experienced a similar thing.

Greetings