u/Low_Instruction3964

• thriller, 1993–2003, English-language

• Businessman/salesman sent to a rural country estate

• An old man who pretends to be disabled (wheelchair or similar)

• The old man’s young, beautiful dark-haired wife is used as bait to seduce the visitor

• The visitor and wife go on an early morning horse ride

• He accidentally witnesses a Black male servant and a woman having sex in a barn/stable

• At the end, everything is revealed as a staged cruel experiment/prank

• The old man is revealed to not actually be disabled.