She spilled on that panel tho
I think she feels like her real sons are still gone (the ones she created from the demon souls after the salem's seven retcon) billy and tommy are not really connected to her by bloodline and she didn't raise them either, also the ages gap but i guess they do feel some type of connection and care for each other.
I'm all for interactions between them as family but marvel is not reallt invested in them as family hopefully if trial of magneto ends up being somethint positive to Wanda (let's see) they do have them interacting more.