“Darn my mind. Now I’m picturing Billie as a daughter of a single Dad. Although it never really bothered her, I see her overwhelmed by affection from her boys’ moms at every opportunity.“
… so then my hand slipped and I designed a dad for Billie. you’re welcome. :o
Billie’s Dad is a refined “silver fox” type of guy. he lives under a vineyard in Napa Valley.
P.S. this is the only PaTB parent I've drawn so far who wasn't in the show. :P hooray for expanded-universe fan-designs, I guess!