I think Sabina K and Sabina Karen are the same person.
I have the following data in my database for Sabina Karen:
(as Sabina Karen) Les Belles Etrangeres (D:Marc Dorcel, VHS:300 004)
(as Sabina Karen) Julie La Douce (D:J.Helbie, VHS:300 016)
(as Sabina Karen) Secrets de Femmes (D:Michel Barny, VHS:39012)
(as Sabina K) Une Femme Nommee Desir (D:Michel Barny, VHS:39013)
(as Sabina K) Pulsions Inavouables (D:Michel Ricaud, VHS:39016)