I think Bex did imagine that if she followed the DNA trail, she would find - at the very least - that her mom was a liberal rebel teenager who felt they couldn't handle a baby at the time, but probably morned for 30 years the kid she gave up, beacuse of her strict catholic parents who encouraged her to make the decision. Right before she made contact, she was fantasising about how her bio-mom would love and accept her. I think she also hoped the family would be one big liberal no-questions asked hugfestI wonder if the bioparent saga has had more of an impact than we realized on our dear Bex.
She'd never really thought it through, that people who would give up a child for adoption probably would have aborted if they had the ability or their moral values allowed it. Especially since she was a Catholic adoptee, it was obvious to anyone who'd thought about it that her parents were likely to have been pro-life religious conservatives.
But she hadn't thought about it, and her BPD forced an idealization of her absent parents. So she went into finding out about her biological origins full of hope that she'd find a welcoming, liberal family who would give her uncritical validation just for being herself.
Sadly on the other end, the closest she got was her dad, who didn't even know she existed and thus had never really thought of or knew her - the most we know about bio-mum was that the truth was such that Bex didn't even want to share those details on her twitter, and that's saying something for someone who broadcasts her own hate mail on a daily basis.
She seemed to quickly twig that the bio family as a whole probably wasn't going to put up with (or wasn't rich enough) to do the sort of things Mami and Papi unconditionally put up with, because she stopped talking about them shortly after that.