The focus of this question must be on the affair partner, rather than the male. When a woman chooses to engage in a relationship with an attached man, she is the agent defining the situation. The man is simply complicit in her decision.
True liberation from oppressive social and cultural structures means putting yourself, and your needs, before other concerns. Women who enter into sexual relationships with partnered men are acting purely in their own self-interest. After millennia of being limited by oppressive patriarchal structures, this behaviour represents strength and female liberation from these long-standing norms. This is an enlightened way of being. Whether the man chooses to respond is his decision. But a woman's expression of sexual interest in this context should be read as empowering.
While this may offer an alternative reading into the female motivations for infidelity, they shed no light on why men cheat. While the woman may actively tempt the man, she cannot be held responsible for his actions.