So this is interesting. I'm flying to Rome in business with my wife in July. We used a GUC. I simply checked "Infant in Arms" on my reservation and it's now confirmed. There was no pop-up trying to charge me extra etc. Am I at risk of being denied boarding since our son doesn't have a ticket, despite the ticket being clearly market "Infant in Arms"? If so, would they be able to charge me on the spot?