Well...maybe. I mean, how much does Adrian really know about his parents' circumstances before he was born. I suppose he could whip out the cell phone and just ask if something Pearl tells him (about what Jacqui told her) seems off to him. But...ah, he doesn't seem all that close to his parents. That Skype conversation seems to be the first time he's tried to contact them since he moved to Kearsage.
Otherwise, he might have heard a few things about Jacqui when he let them know that he was working for her at "Deep Black Vinyl." In fact, both of them might have had a lot of things to say after they found out he moved to Wilmot. We'll see if he tries to communicate with them more frequently now.
Note--Pat and Miel don't seem distant or adversarial, just sort of...disengaged. Is this a factor of the nature of their relationship to one another?