his sister died years ago leaving lyle to take guardianship of his sis' kids. two boys and a girl. lyle's nephews and niece range from 25 to 20ish. yours would be the youngish child (20-22). don't mind pushing the age up a lil if need be. she was the last one out of the house. currently attending or maybe finished college, the rest i'll leave up to you except for certain things to be filled in like their dynamic from when she was in his care to current and maybe some other fam info i'm forgetting.