[x] Broad disclosure. Give her a filtered version of the events as you know them. You had a Vision a while ago, saying aliens were coming and that they were hostile. Tell her everything through the lens of human ki users being the active parties.
[X] Full disclosure. Surely you can convince Dad to cast away the Masquerade your people have maintained for centuries for not terribly much reason at all, right? Well, once you do, go walk back upstairs without a Masque on, and start explaining.