Emma's living room glowed under the soft lamp light, the remnants of dinner cleared away hours ago. She sat on the plush couch between her husband Michael and their close friend Riley, the air thick with unspoken tension. Michael, tall and broad-shouldered with a commanding presence, rested his hand on Emma's thigh, his fingers tracing slow circles that made her shift slightly. Emma, her curves accentuated by a tight black dress, glanced at Riley—a lean, athletic woman with short dark hair and piercing green eyes—who sipped her wine nervously.