Disclaimer:Naruto isn't mine
Being a dad means feeling guilty because you forgot the aroma therapy oils that she says are the only thing that will help reduce her pain.
Iruka was on an aroma therapy kick during the last months of his pregnancy. He thought they were nice spelling and had a very calming effect. Kakashi thought they overpowered the house and made his eyes water.
Even after Kami knows how many hours worth of fighting, Kakashi agreed to bring the aroma therapy oils into the delivery room when it was time. As Iruka pointed out, it was him, Iruka, and not Kakashi that was the one who was going to be in pain. The least Kakashi was do, was to bring something as simple as aroma therapy oils.
But he hadn't. They were right next to the baby bag. How could he have missed them. There were five of them. Right in easy reach and he forgot them. And the winner of this year's Worst Husband Award goes to... Kakashi Hatake! According to Anko at least.
In the end, Anko managed to bust into the delivery room carrying five aroma therapy oils.