Lori was married to Charles Vallow.
Charles' sister, Kay, has a son.
Kay's son is the biological father of JJ (bio parents are not named in MSM so we can't name them here).
JJ's biological parents had some issues and were unable to care for him when he was born.
JJ's grandparents Kay and Larry took care of him for the first 9 months of his life.
Then Kay's brother Charles (and his wife Lori) legally adopted JJ while he was still a baby.
That makes Charles biologically JJ's great uncle, but legally JJ's father.
Charles is now deceased (shot to death by Lori's brother Alex).
ETA: JJ's bio-parents are alive but only Lori has legal parental rights to JJ currently. JJ's Bio-parents either gave up or lost their parental rights when JJ was adopted. MOO.