Are only White people allowed?

I was waiting in a hospital waiting room yesterday and there was this African American kid waiting with his parents. His dad was an African American and his mom was white. His mom was pregnant and had come to visit the doctor. As her name was called, she walked in and his dad told the child ‘We are not allowed inside. Only mom should go’. After a little while another person who was waiting was called and both the parents went in. Incidentally they both happened to be white. This kid who was watching this immediately asked his dad ‘So only white people are allowed to go in?’ Everyone who heard this was shocked and I could see that the dad was very embarrassed.