A man is kept hostage for some reason I believe it was for criminal purposes, he loves a woman and is cooperating to keep her safe. Infact the woman and the man keeping the main character hostage are lovers and maybe brother and sister. I remember the hostage see’s them in a hot tub maybe kissing. This film may be anytime from the 90’s. I believe it to be American and I watched it over ten years ago! It was a crime themed film, sorry I cant be more help.
I’m just going to throw this out there, since there are some similarities: Reindeer Games. If I recall correctly, the bad guy played by Gary Sinise pretends that Charlize Theron is his sister but really she is his girlfriend. Then there is a plot twist and she’s not really his girlfriend after all. Ben Affleck plays the good guy they hold “hostage” by threatening Charlize.
http://www.imdb.com/title/tt0184858/?ref_=fn_al_tt_1
Looks like it! got it on now 🙂
OK, I am going to mark this “solved” and give HB the credit.