I made a family with a husband, wife, and daughter. I made the wife cheat on her husband with the neighbor and they had a baby. The father was happy and awaiting the baby to come. I even had him ask her what did she think of the neighbor, and she told him "I am SO in love with Tyler!" He smiled and their relationship gained another plus. The husband then proceeded to kiss her after she gave him the news. When she went into labor, he went with her and missed work. He even greeted the newborn and treated her like his own kid. In The Sims 3, when a wife has an affair and a baby is born from it, she gets the cheater reputation. On The Sims 4, the only time your sim will react from cheating is being in the same room as it happens. Well, why would I invite her love affair over anyway? I even moved the new baby into the father's house, and then came over to visit them with her other daughter. So her daughter witnessed her mom cheating with the neighbor, and no reaction from the kid. No moodlet or anything form her. On Sims 3, the kid notices infidelity. So pretty much she has zero chance of getting caught.
