It is common knowledge from research that most ladies in real life are not fully satisfied emotionally because most men performance is decreasing drastically.
No matter what you give a wife as a man, if you cannot satisfy her, she will always be discontented, complaining and certainly if opportunity knocks her door, she will try luck elsewhere. In case she had a boyfriend before marriage who made her feel the deep intensity, never be surprised if she looks for him (even if he is ‘a nobody’).