[Chinese]HUNTB-727 The secret to a harmonious marriage is swapping partners? A couple in a sexless, long-term marriage gets invited by close friends to try partner swapping and ends up hooked...

A couple in a long marriage that has become sexless. After venting their frustrations to friends, they are suggested to try swinging for a change of pace... At first, the woman is too tense and disgusted to take the plunge. But once she does, it's an unprecedented cauldron of pleasure. Watching her husband & wife being taken right in front of her. Jealousy and sensation tear at her heart, drawing them deeper into the abyss. After experiencing this, ordinary sex no longer satisfies them. Incidentally, their sexless period was also resolved.