You're welcome ECM.
I think the family MAY have just been a random family with a NORMAL life . . . the kind of life Huck might have had for himself if he hadn't been a trained killer. He made a point of telling Becky things about their eating habits (pizza night) & their recreation habits (game night).
Then again, with the twists and turns this show is famous for, it could turn out that the husband/wife was a brother/sister to Huck.