Here’s my take on this.
On one hand, you can look for behavioral changes. Things like a sudden need for privacy with their phone, deleting chat histories, or being online at unusual hours can feel suspicious. Many people would consider these to be red flags. However, it’s worth remembering that such behaviors can be ambiguous and might have other explanations, like work stress or planning a surprise. Relying solely on these signs can lead to misunderstandings.
On the other hand, for a more direct approach, tools designed for monitoring can provide clarity. Instead of trying to interpret behaviors, you get access to the actual data, such as messages and call logs. This removes the guesswork and gives you a clearer picture of the situation.