phoebe's dad was basically a two-hit wonder circa the late 80s/early 90s and he basically has a number of kids from relationships or one night stands during the height of his career. since he was touring, the kids weren't just relegated to to being from austin, as for example, leah (~coccaro) was from new york. phoebe wasn't even made aware of her sibs until about tennish years ago, as a teenager, but she's reached out and tried to meet them, so she'd at least know about them (though how they get along is ultimately up for working out!). the way i view their upbringing was that malachai, their dad, wasn't looking to run from responsibility or anything, like he acknowledged the kids as his and cared for them in his own way - most of his way was just monetarily, spoiling them and showing up occasionally in their lives as the "fun" parent who made things probably pretty difficult for their mothers (since he wasn't great at stability/advice/discipline), but he meant well. of course a lot of that history and how your character would be open to figuring out, since i imagine not everyone would be grateful to have such a sporadic presence in their lives/upbringing.