A couple of weeks back we finally started being open with our husband about who is up front at any one time. He is getting to know us individually and is starting to tell us apart rather reliably too

Yesterday was a bit of a mess of a day and amidst a lot of upset it appears someone we hadn't been aware of previously got triggered Out.
Our husband and I were discussing an upcoming visit from the Mother. We're pretty anxious about that one as soon as she is responsible for the majority of the things we're working through these days. We were anticipating ways she might goad us into a reaction (not a good idea I know but we were pretty out of it by this point) and our husband said that if she did that he would push her out of the house. He meant he would ask her to leave but I felt pushed back.
It is all a bit hazy from there.
We threatened the husband telling him he could not ever push the Mother, then ran off to the bedroom and hid under the blanket. Le doh. Anyway, our husband came after us, took the blanket and asked the Fronter's name. When they said they didn't know he went through each of our names and asked if the Fronter was them. He got eight NO!s for an answer.
The Fronter told him they were "nobody". That they didn't have an age or a gender. That the only thing they do and want is to protect the Mother. They said they remember they used to go grocery shopping with Mother and that the last time they Fronted was at an event where they performed the same "protection" for our Mother-in-law (about a year ago).
Throughout the whole conversation the Fronter kept asking our husband over and over to confirm that he would not push the Mohter.
I understand that some Parts/Alters aren't as fully formed as others. That it is normal for some not to have age or gender. That sometimes names have to be chosen later.
The thing that leaves me unsure of myself is that this is the first time we've met somebody new this way. We've never been in a position where an Outsider spoke with somebody new before we got to know them "internally" and he himself was a little worried about what role suggestion might play in this (i.e. if a confused Part who is triggered is asked their name and they don't feel like themselves would you expect them to answer like this Part did?).
Does this experience sound in any way off? Have you ever had a Part get so confused when triggered they thought they were somebody else as yet unknown to the System?
Thanks
Odessa