Melody for a Hustler (1998)

A small-time crook Gaston who poses as a millionaire after he picks up hitchhiking 16-year-old Marie-Pierre. Actually living in a seedy apartment, he deals in stolen goods, but he soon climbs to bigger heists, including car thefts. Concealing his illegal activities, he operates his company, Extramill, out of upscale, posh offices, while he and Marie-Pierre move into a sedate upper-middle-class neighborhood. Life is sweet, but the onset of paranoia, kinky sex activities, and police probes eventually culminate in violence.