A sister-in-law who is cuter, healthier, and more cheerful than your wife. She's absolutely someone you shouldn't lay a hand on, but what if a man finds himself in a situation where he can't help but lose his rationality? You just do it without your wife finding out! After getting married, the romantic feelings between you and your wife have already fallen apart, and you start thinking about lust... Why don't you watch this work and try crossing that dangerous bridge?
