I don't know your particular circumstances, but barring a personal reason for not being able to leave... It's your first job in the industry that you just start

I don't know your particular circumstances, but barring a personal reason for not being able to leave... It's your first job in the industry that you just started last week and your father in law gave you the position, it is always an option to leave. And when you do leave, you will feel better for having done it.