This is legitimate. Many men do. But the solution is not to date a younger woman and secretly lust after her mother. The solution is to date an older woman who is unrelated to anyone you’ve dated .
Finding your girlfriend's mom attractive doesn't make you a bad person; it makes you a person with eyes. However, acting on it, dwelling on it, or letting it affect how you treat your partner makes you a "bad boyfriend" candidate. My Girlfriend-s Mom Is Much Finer than Her- So ...
If you find yourself in this position, consider these steps for professional or personal self-preservation: This is legitimate