Del is Snot's mom Mrs. Lonstein's new boyfriend in "Paranoid Frandroid".
He has the pair move in with him at his Chesterbrook Condominiums townhouse and Snot is less than thrilled, although Steve and Klaus are excited to help him turn his new basement bedroom into a bachelor pad. Snot gets into the swing of things but he and Steve strike out in inviting ladies over. However, Mrs. Lonstein falls for the lure of the basement and moves on Klaus, which results in Del kicking the pair out.