I have no money, but my wife has sex with an old man for money. I don't know what to do.

To put it bluntly, sex life and love are two different things, just like marrying a virgin or a non-virgin. Most of them are not realized by their own ideas.

You can ask her and see how she answers you. You can trust her if she says she loves you. After all, you have been together for a long time, so trust her. She must have some unspeakable secrets. If she says she doesn't love you, you can leave quietly like a man.

By the way, love and sex are two different things. Only when there is love can there be sex, but it is not necessarily love that has had sex. Depends on what you think.