Mary didn’t talk about any extended family when she started dating Warren other than her older brother, Alex. As he didn’t have all that many relatives either, he didn’t find it odd that he was never introduced to any parents, grandparents or siblings. It wasn’t that odd in his experience to either not have family around or to be so estranged from them that they didn’t factor into any decisions you made.
His parents hadn’t been all that attached to him, but had worked long and hard jobs that kept them from one another as well. They weren’t bad people, but they weren’t very good at interacting with other human beings on anything other than a professional level. There were times when Warren honestly wondered how he’d come to exist.