"Custody" aka "Custody of the Heart"
as John Sullivan
Lifetime Television Movie

After a husband loses his wife, all he has left to comfort him is his adopted teenage daughter.  But the widower's life gets complicated when the girl's biological father (James Denton as John Sullivan) comes forward claiming he wants to raise the girl as his own.  It's a fight to the finish to see who will win custody of their daughter: the biological father who abandoned her as an infant, or the man who raised her.