Daemon certainly would have been, one assumes. And considering they were touchingly close and the man seems to have been desperately trying to make up for being a non-existent, shitty father it seems to me that he may have also told Nettles about that. There must be a reason why she is as distraught as he was when they parted ways. Nettles is more or less confirmed to have the fatherless daughter of a dockside whore on Driftmark. Her age fits with the time Daemon would have spent time there