According to IMDB, Tera started making films in 1990 when she was 21. She looked young, thin and had dark hair.
By the early 2000s, there was either a second performer using the name "Tera Heart", or Tera (31 years old) became a MILF. Blond hair and a bit thicker.
Is the same person as the Tera Heart in the first pic?