I think it's a 90's american movie.
A married couple pick up two hitch-hikers in their car, who finally steal the car and kidnapped the wife, meanwhile the husband remains on the road.
The wife, a blonde woman like Nicollette Sheridan, Kelly Lynch or Shannon Tweed, had an affair with one of the bad guys afterwards.
At the end the wife achieves to meet again with her husband.
Thanks for your help.