Does the wife secretly send and receive text messages at midnight (12:00) mean that she is having an affair? How to deal with it?

Trust your wife first, unless you have conclusive evidence.

If you can't find the evidence, but you are curious.

You can choose 1 to have a gentle chat with her sometime.

When you find her quietly texting, you send her a message: honey, pay attention to rest when the mobile phone radiates.

And you secretly pretended to send text messages. If she really cheated, she won't care about you. On the contrary, she will be curious, take the initiative to talk to you, and you can tell your confusion.

I thought of it myself. I hope I can help you.