- Country: USA
- Genres: Thriller
- Release: 1996-10-28
- Director: John Patterson
- Writers: Carmen Culver
- Language: English
- Stars: Bonnie Bedelia , Brian Austin Green , Joe Spano , Gina Philips , Steven Gilborn , Roma Maffia , Andrew Craig , Ron Brooks , Gene Wolande , Zar Acayan
- Runtime: 96 min
- Awards: N/A
- AKA: Il prezzo del tradimento (Italy) , Amor Proibido (Portugal, Portuguese Republic) , Liaison coupable (France, French Republic) , Der teuflische Liebhaber (Germany) , Her Costly Affair , Drága tanulópénz (Hungary) , Un romance peligroso (Spain) , Um Caso Perigoso (Brazil) , Pahalıya Mal Olan İlişki (Turkey) , Kallis suhde (Finland) , Her Costly Affair (United States of America) , Consensual Relations , Fatalny romans (Poland)
- Plot: A professor's casual fling with her graduate student turns deadly when he insists on a more permanent arrangement.
- IMDB:tt0116517
Her Costly Affair Cast · · · ALL
John Patterson
Director
Bonnie Bedelia
Dr. Diane Weston
Brian Austin Green
Jeff Dante
Joe Spano
Carl Weston
Gina Philips
Tess Weston
Steven Gilborn
Dr. Sorenson
Roma Maffia
Sally Canter
Andrew Craig
Matt
Ron Brooks
Bob
Gene Wolande
Don
David Ramsey
Shep Walker
William Bassett
Ed Baines
Benito Martinez
Campus Cop
Taylor Sheridan
(I)
Chris
Amy Smart
Dee
Jeanne Sakata
Mrs. Beals
Laurie Fortier
Liz
Amanda Carlin
Jeannette
Chris Ellis
(I)
Wes
Sara Mann
(I)
Student