Women need attention, not just money and sex
Women need attention, not just money and sex. Money and sex don't always make a woman comfortable and feel satisfied. She needs attention.
Most women say that it is the lack of money, sex and attention why they cheat, so you might be correct. However, there are many other factors why women cheat, such as boredom, revenge, low self-esteem, illness, etc. They want to feel the thrill of it and they are tired of their partners.