Tev had a pretty good relationship with his parents. I think I mentioned in a post the other day that he was the oldest of two. Tev was definitely his mother’s child, but his dad had enough pull to get him stationed within Slivermoon city, and since that which lead to Tev’s confrontation during the sacking of Quel’Thalas and his subsequent raising, his father was actually indirectly responsible for him becoming a death knight.
There probably won’t ever be any sort of tearjerking reunion between them and their wayward son since both of them were killed trying to save Tev’s sister as Silvermoon fell. (Tev’s empty coffin was placed next to theirs in the family crypt.)