Is there no possibility Bronwyn’s dad lied?

Bronwyn maintains that Gwen’s dad’s family MUST have known Gwen was born and existed because Bronwyn’s dad called them and told them so. From what Bronwyn has told us at the foot massage, her parents were 1) quite religious, and 2) very unhappy with her having a kid, so much so that Bronwyn talks about basically having to be a single mom (am I misremembering this)?

So, wouldn’t it be possible that Bronwyn’s dad called the family and told them a different story? This is hardly a culture that’s disincentivized to lie about these types of things, especially for how “embarrassing” they can be to the family. I know it sounds crazy but like, I’m having a hard time wrapping my head around how else a misunderstanding could go on like this for 18 years.

I suppose the other explanation is that family was just lying and are total jerks too. But the fact that Bronwyn keeps pointing to the fact they MUST know because her dad called them makes it feel like he was a link the chain. Idk. Am I totally off here? I wouldn’t even get hung up on it if Bronwyn wasn’t SO mad at Lisa for uttering it even though it doesn’t even really seem like it came from her. To be clear I’m not a Bronwyn OR Lisa stan this is just me trying to figure out how this big sticking point is even possible.

Edit: people keep mentioning his health and to be clear, I don’t feel any of this is an attack on him. I didn’t even know he had those issues and I don’t see how they’re relevant to this. Wondering if it’s plausible that someone lied is not an attack on them.