Agathas Sigil Makes Me Even More Convinced That Teen Is Scarlet Witchs Son
Agatha All Along episode 4 revealed something new about "Teen's" sigil, which makes me even more sure he's related to Wanda Maximoff's Scarlet Witch.
https://screenrant.com/agatha-all-along-sigil-teen-billy-scarlet-witch-theory-explained/