As they started fighting over toys in front of some older patients - who probably raised their children properly - I wondered how the clinic could already be 15 minutes behind their first appointment of the day.
We got in to the doctor's office and both kids started complaining about how hungry they were - as if they hadn't just eaten Weetbix and toast.
While I was distracted by talking to the doctor, they found their lunch in my bag and started leaving sandwich crumbs on the clean floor.
But it was all was okay, until I had to sit my daughter on my lap for the doctor to check her ears.
My son took offence to being moved aside and began howling and sobbing. He hurled his sandwich across the room and threw himself down on the floor and started rolling around.
Seeing my exasperated sigh, the doctor showed me a technique for handling tantrums. It worked but I suspect was only successful because it wasn't coming from me.
"When you are finished, you can have a stamp," she told him as he wailed.
Yeah, a stamp on the foot, you little bugger. How dare you do this to me!
When I resolved a fight over a toy the doctor said I handled it exactly the right way. As if there is one.
So do I need to take a parenting course or not? I don't know. The doctor can't know. No one knows.
You speak to some people and they'll say you have a problem. You speak to other people and they'll say it's totally normal for their age.
Was that the worst my children will behave for the next few months, or is it just the beginning of bad behaviour?
Please don't tell me. I don't think I want to know.