What would you do if your girlfriend cheated on you?

Let's say that you live in a world where humans and occasionally some animals, can communicate with each other. There are a species of wolves who are half human and half wolf. Unfortunately, your girlfriend is extremely interested in this species of wolf but lied to you and said she wasn't.

3 years later she gets pregnant, has a baby and it's painfully obvious that the baby is.... Different. It acts like a literal animal sometimes.

What would you do, men?