Here’s my take on this. It’s a tough spot to be in when communication patterns change, especially around devices. Increased phone privacy can be a red flag, but it’s not always definitive proof. There could be other reasons for it.
Using monitoring tools to get a clearer picture is one approach. On one hand, seeing call logs or location history can provide the concrete answers you’re looking for and end the painful uncertainty. On the other hand, it’s a significant step. If your suspicions turn out to be unfounded, the act of monitoring itself could cause a major breach of trust if discovered. It’s a tool that provides data, but you have to be prepared for what you might—or might not—find.