agreed, also they are family through marriage/adoption(nohr), they're real mother does have a name Ikona while nohr the family is half siblings through concubines, nohrs "advertisement" was because people had way much expectations before the release with only speculations and no facts and of course the 3rd path ties everything together from the unknown attack, fake Garon, dead takumi, dark Dragon, the true fire emblem, etc.so all in all there was no lie.