Betraying or breaking a partner's trust is a surefire way for a relationship to crumble.

And since this can happen a lot in romantic relationships for many reasons, I wanted to know: "What is the biggest betrayal you have ever experienced while in a romantic relationship with someone?"
For instance, maybe your partner didn't flat-out physically cheat on you, but you found out they were emotionally cheating with someone when you were going through the loss of someone very important.

Or maybe you became incredibly ill, but your partner showed a lack of support — emotionally and physically.

Finally, perhaps your partner took their mom's side over yours during a very heated argument when their mom was clearly in the wrong.
